+ All Categories
Home > Documents > Cell Reproduction Page #1 Warm Up Where are your genes located?

Cell Reproduction Page #1 Warm Up Where are your genes located?

Date post: 29-Dec-2015
Category:
Upload: pamela-campbell
View: 219 times
Download: 0 times
Share this document with a friend
Popular Tags:
121
Cell Reproduction Page #1 Warm Up Where are your genes located?
Transcript
Page 1: Cell Reproduction Page #1 Warm Up Where are your genes located?

Cell ReproductionPage #1

Warm Up

Where are your genes located?

Page 2: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://people.na.infn.it/~nicodem/research/cell_genes.jpg

Page 3: Cell Reproduction Page #1 Warm Up Where are your genes located?

•DURING MOST OF THE CELL’S LIFE, DNA FORMS A TANGLED MASS CALLED CHROMATIN.

•CHROMATIN LOOKS LIKE A PLATE OF SPAGHETTI.

•RIGHT BEFORE A CELL DIVIDES, THE CHROMATIN FORMS INTO CHROMOSOMES

(X-SHAPED).

Page 4: Cell Reproduction Page #1 Warm Up Where are your genes located?

MOST OF THE TIME ONCE IN A WHILE

CHROMATIN CHROMOSOMES

Page 5: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 6: Cell Reproduction Page #1 Warm Up Where are your genes located?

Cell Division

• Chromosomes = Tightly coiled, rod-shaped DNA• Chromosomes are made of chromatin• Human body produces 2 trillion cells per day & 25

million per second• Cells are formed by cell division of older cells

1. When a cell divides, DNA is first copied & then distributed

2. Each cell ends up with a complete set of DNA

Page 7: Cell Reproduction Page #1 Warm Up Where are your genes located?

Chromosome Number

• Each human somatic cell has 2 copies of 23 different chromosomes – Total 46– Somatic = any cell that is NOT a sex cell– (also called body cells or autosomes)

Page 8: Cell Reproduction Page #1 Warm Up Where are your genes located?

Sets of Chromosomes

• Each pair is made up of 2 homologous chromosomes– Homologous chromosomes = chromosomes that are similar

in size, shape, & genetic content

– Each homologue comes from one of the parents• One from mom

• One from dad

Page 9: Cell Reproduction Page #1 Warm Up Where are your genes located?

Cells Can Be Diploid or Haploid

• Diploid = a cell that contains 2 sets of chromosomes (2n)

• Haploid (monoploid) = a cell that contains only 1 set of chromosomes (1n or n)

Page 10: Cell Reproduction Page #1 Warm Up Where are your genes located?

Chromosomes Determine Your Gender

• Humans have 23 pairs of chromosomes

• 22 pairs are autosomes (chromosomes NOT directly involved in determining sex)

• 1 pair are sex chromosomes (contain genes that WILL determine the sex)– X & Y chromosomes

Page 11: Cell Reproduction Page #1 Warm Up Where are your genes located?

X & Y Chromosomes

• Male = XY• Female = XX• Male (dad) can donate an X or a Y to

offspring• Female (mom) can ONLY donate an X

So-Which parent determines the sex of the baby?

Page 12: Cell Reproduction Page #1 Warm Up Where are your genes located?

MALEXY

Page 13: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gametes

• Gametes are reproductive cells– Males = sperm (n = 23)– Female = egg (n = 23)

• Combine in fertilization to make a: – Zygote (2n = 46)

Page 14: Cell Reproduction Page #1 Warm Up Where are your genes located?

Haploid VS Diploid

Page #2

Page 15: Cell Reproduction Page #1 Warm Up Where are your genes located?

““UnderstandingUnderstandingthe concepts ofthe concepts of

Haploid and Haploid and Diploid”Diploid”

Haploid and DiploidHaploid and Diploid

Page 16: Cell Reproduction Page #1 Warm Up Where are your genes located?

Introducing VocabularyIntroducing Vocabulary

Diploid= DIH – Diploid= DIH – ploydployd

Haploid= HA – Haploid= HA – ploydployd

Page 17: Cell Reproduction Page #1 Warm Up Where are your genes located?

Let’s take a look at the terms first….Let’s take a look at the terms first….

Diploid= Diploid= Di Di Ploid Ploid““DiDi” means “” means “twotwo””

Haploid and DiploidHaploid and Diploid

Page 18: Cell Reproduction Page #1 Warm Up Where are your genes located?

Let’s take a look at the terms first….Let’s take a look at the terms first….

Haploid= Haploid= HaHa Ploid Ploidthink “think “HAHAlf”lf”

haploidhaploid is is half half of diploid.of diploid.

Haploid and DiploidHaploid and Diploid

Page 19: Cell Reproduction Page #1 Warm Up Where are your genes located?

ReviewReview

““DiploidDiploid” means” means

Haploid and DiploidHaploid and Diploid

Half Two

Page 20: Cell Reproduction Page #1 Warm Up Where are your genes located?

ReviewReview

““HaploidHaploid” means” means

Haploid and DiploidHaploid and Diploid

Half Two

Page 21: Cell Reproduction Page #1 Warm Up Where are your genes located?

GOOD JOB !!!GOOD JOB !!!

You’re on the way !!!You’re on the way !!!

Page 22: Cell Reproduction Page #1 Warm Up Where are your genes located?

Introducing VocabularyIntroducing Vocabulary

Gamete= GA - Gamete= GA - meatmeat

Somatic= So-MA-Somatic= So-MA-tiktik

Page 23: Cell Reproduction Page #1 Warm Up Where are your genes located?

A A “Gamete”“Gamete” is a is a generic term for a generic term for a

“sex cell”.“sex cell”. An example would be An example would be

a a spermsperm or an or an eggegg..

Haploid and DiploidHaploid and Diploid

Page 24: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gametes areGametes are HaploidHaploid in in

chromosome chromosome number.number.

Haploid and DiploidHaploid and Diploid

Page 25: Cell Reproduction Page #1 Warm Up Where are your genes located?

The The numbernumber of of chromosomes that a chromosomes that a

gamete gamete would contain would contain would be would be described described

as______as______

Haploid and DiploidHaploid and Diploid

Haploid Diploid

Page 26: Cell Reproduction Page #1 Warm Up Where are your genes located?

““Somatic cellsSomatic cells” ” refers to refers to every every otherother cell cell in the in the

body body exceptexcept gametes.gametes.

Haploid and DiploidHaploid and Diploid

Page 27: Cell Reproduction Page #1 Warm Up Where are your genes located?

ReviewReview

SpermSperm or or EggEgg = = GametesGametesAll All Other Other cells = cells = SomaticSomatic

CellsCells

Haploid and DiploidHaploid and Diploid

Page 28: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gamete or Somatic Cell ?Gamete or Somatic Cell ?

A Liver CellA Liver Cell

Haploid and DiploidHaploid and Diploid

GameteSomatic

Cell

Page 29: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gamete or Somatic Cell ?Gamete or Somatic Cell ?

A Sperm CellA Sperm Cell

Haploid and DiploidHaploid and Diploid

GameteSomatic

Cell

Page 30: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gamete or Somatic Cell ?Gamete or Somatic Cell ?

A Brain CellA Brain Cell

Haploid and DiploidHaploid and Diploid

GameteSomatic

Cell

Page 31: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gamete or Somatic Cell ?Gamete or Somatic Cell ?

A Lung CellA Lung Cell

Haploid and DiploidHaploid and Diploid

GameteSomatic

Cell

Page 32: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gamete or Somatic Cell ?Gamete or Somatic Cell ?

An EggAn Egg

Haploid and DiploidHaploid and Diploid

GameteSomatic

Cell

Page 33: Cell Reproduction Page #1 Warm Up Where are your genes located?

Gamete or Somatic Cell ?Gamete or Somatic Cell ?

A Skin CellA Skin Cell

Haploid and DiploidHaploid and Diploid

GameteSomatic

Cell

Page 34: Cell Reproduction Page #1 Warm Up Where are your genes located?

Keep Going !!!Keep Going !!!

HAlf way There !!!HAlf way There !!!

Page 35: Cell Reproduction Page #1 Warm Up Where are your genes located?

Somatic Cells Somatic Cells areare DiploidDiploid in in chromosome chromosome

number.number.

Haploid and DiploidHaploid and Diploid

Page 36: Cell Reproduction Page #1 Warm Up Where are your genes located?

The The numbernumber of of chromosomes that a chromosomes that a somatic cell somatic cell would would contain would be contain would be described as______described as______

Haploid and DiploidHaploid and Diploid

Haploid Diploid

Page 37: Cell Reproduction Page #1 Warm Up Where are your genes located?

ReviewReview

Gametes =Gametes = haploid haploidSomatic Cells = Somatic Cells =

diploiddiploid

Haploid and DiploidHaploid and Diploid

Page 38: Cell Reproduction Page #1 Warm Up Where are your genes located?

Mathematically SpeakingMathematically Speaking

if if haploid=nhaploid=n,,then then diploid=2ndiploid=2n

Haploid and DiploidHaploid and Diploid

Page 39: Cell Reproduction Page #1 Warm Up Where are your genes located?

Mathematically Mathematically SpeakingSpeaking

or… or… haploid is haploid is ½½ of of diploiddiploid

or… or… diploid is diploid is 2x2x haploid haploid

Haploid and DiploidHaploid and Diploid

Page 40: Cell Reproduction Page #1 Warm Up Where are your genes located?

ReviewReview

SpermSperm or or EggEgg = = GametesGametes==HaploidHaploid==nnAll All Other Other Cells = Cells = SomaticSomatic CellsCells==DiploidDiploid==2n2n

Haploid and DiploidHaploid and Diploid

Page 41: Cell Reproduction Page #1 Warm Up Where are your genes located?

Humans have Humans have 4646 chromosomes in their chromosomes in their somatic cellssomatic cells. These . These

cells are cells are ____________

Haploid and DiploidHaploid and Diploid

Haploid Diploid

Page 42: Cell Reproduction Page #1 Warm Up Where are your genes located?

Humans have Humans have 2323 chromosomes in their chromosomes in their gametesgametes. These cells . These cells

are are ____________

Haploid and DiploidHaploid and Diploid

Haploid Diploid

Page 43: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646, what , what

is the is the haploidhaploid number?number?

Haploid and DiploidHaploid and Diploid

23 92

Page 44: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans haploidhaploid number = number = 2323, what , what

is the is the diploiddiploid number?number?

Haploid and DiploidHaploid and Diploid

46 92

Page 45: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf chimps chimps diploiddiploid number = number = 4848, what , what

is the is the haploidhaploid number?number?

Haploid and DiploidHaploid and Diploid

24 96

Page 46: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf chimps chimps haploidhaploid number = number = 2424, what , what

is the is the diploiddiploid number?number?

Haploid and DiploidHaploid and Diploid

48 96

Page 47: Cell Reproduction Page #1 Warm Up Where are your genes located?

Review AgainReview Again

Sperm or Egg = Gametes=Haploid= Sperm or Egg = Gametes=Haploid= nnAll Other Cells = Somatic Cells=Diploid= All Other Cells = Somatic Cells=Diploid= 2n2n

Haploid and DiploidHaploid and Diploid

Page 48: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646,, How many How many

chromosomes in achromosomes in a liverliver cell ? cell ?

Haploid and DiploidHaploid and Diploid

23 46

Page 49: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646,, How many How many

chromosomes in a chromosomes in a spermsperm cell ? cell ?

Haploid and DiploidHaploid and Diploid

23 46

Page 50: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646,, How many How many

chromosomes in achromosomes in a brainbrain cell ? cell ?

Haploid and DiploidHaploid and Diploid

23 46

Page 51: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646,, How many How many

chromosomes in achromosomes in a lunglung cell ? cell ?

Haploid and DiploidHaploid and Diploid

23 46

Page 52: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646,, How many How many

chromosomes in an chromosomes in an eggegg cell ? cell ?

Haploid and DiploidHaploid and Diploid

23 46

Page 53: Cell Reproduction Page #1 Warm Up Where are your genes located?

IfIf humans humans diploiddiploid number = number = 4646,, How many How many

chromosomes in achromosomes in a skinskin cell ? cell ?

Haploid and DiploidHaploid and Diploid

23 46

Page 54: Cell Reproduction Page #1 Warm Up Where are your genes located?

Up so far !!!Up so far !!!

ALMOST THERE !!!ALMOST THERE !!!

Page 55: Cell Reproduction Page #1 Warm Up Where are your genes located?

Review Last RoundReview Last Round

Sperm or Egg = Gametes=Haploid= Sperm or Egg = Gametes=Haploid= nnAll Other Cells = Somatic Cells=Diploid= All Other Cells = Somatic Cells=Diploid= 2n2n

Haploid and DiploidHaploid and Diploid

Page 56: Cell Reproduction Page #1 Warm Up Where are your genes located?

If If chimp’schimp’s haploid haploid number = number = 2424,, How many How many

chromosomes in achromosomes in achimp’schimp’s liverliver cell ? cell ?

Haploid and DiploidHaploid and Diploid

24 48

Page 57: Cell Reproduction Page #1 Warm Up Where are your genes located?

If If chimp’schimp’s haploid haploid number = number = 2424,, How many How many

chromosomes in achromosomes in achimp’schimp’s eggegg cell ? cell ?

Haploid and DiploidHaploid and Diploid

24 48

Page 58: Cell Reproduction Page #1 Warm Up Where are your genes located?

If If Horse’sHorse’s diploid diploid number = number = 6464,, How many How many

chromosomes in achromosomes in aHorse’sHorse’s liverliver cell ? cell ?

Haploid and DiploidHaploid and Diploid

32 64

Page 59: Cell Reproduction Page #1 Warm Up Where are your genes located?

If If Alligators’sAlligators’s diploid diploid number = number =

3232,, How many How many chromosomes in achromosomes in aAlligators’sAlligators’s liverliver

cell ?cell ?

Haploid and DiploidHaploid and Diploid

32 64

Page 60: Cell Reproduction Page #1 Warm Up Where are your genes located?

If If Dog’sDog’s diploid diploid number = number = 7878,, How many How many

chromosomes in achromosomes in aDog’sDog’s spermsperm cell ? cell ?

Haploid and DiploidHaploid and Diploid

39 78

Page 61: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://www.goldiesroom.org/http://www.goldiesroom.org/Shockwave_Pages/REG-15-Shockwave_Pages/REG-15-haplodvdiploid.htmhaplodvdiploid.htm

Page 62: Cell Reproduction Page #1 Warm Up Where are your genes located?

Mitosis Animation Mitosis Animation

http://www.goldiesroom.org/http://www.goldiesroom.org/Shockwave_Pages/REG-14-tnm--Shockwave_Pages/REG-14-tnm--celldivision.htmcelldivision.htm

Page 63: Cell Reproduction Page #1 Warm Up Where are your genes located?

Page #3 Karyotype

• Karyotype = a photo of the chromosomes in a dividing cell that shows the chromosomes arranged by size.

Page 64: Cell Reproduction Page #1 Warm Up Where are your genes located?

Karyotype cont’d

• Each of an individual’s 46 chromosomes has thousands of genes so the presence of all chromosomes is essential for normal functioning– Humans who are missing a chromosome don’t

survive– Humans with more than two copies of a

chromosome, called trisomy, may survive but will not develop properly.

Page 65: Cell Reproduction Page #1 Warm Up Where are your genes located?

What is wrong?

Page 66: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 67: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 68: Cell Reproduction Page #1 Warm Up Where are your genes located?

The Cell Cycle

• Repeating sequence of cell growth and division during an organism’s life

• 90% of cell life is spent in INTERPHASE

• Then it may go into MITOSIS & CYTOKINESIS

Page 69: Cell Reproduction Page #1 Warm Up Where are your genes located?

INTERPHASE(divided into mini-phases)

• G1(first growth) phase = Cell grows rapidly

• S (synthesis) phase = DNA copied

• G2 (2nd growth) phase = Nucleus prepares to divide

Page 70: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://publications.nigms.nih.gov/insidethecell/ch4_interphase_big.html

Page 71: Cell Reproduction Page #1 Warm Up Where are your genes located?

AFTER INTERPHASE

• Mitosis

• Cytokinesis

• http://www.cellsalive.com/cell_cycle.htm

Page 72: Cell Reproduction Page #1 Warm Up Where are your genes located?

Mitosis and Meiosis

WARM UP

Females are X___Males are X___

Having 3 copies of a chromosome is called a ______________

Page 73: Cell Reproduction Page #1 Warm Up Where are your genes located?

Mitosis and Meiosis

• Mitosis:-division of somatic (body) cells- results in two daughter cells that are identical

• Meiosis-division of gametes (sex cells)

Page 74: Cell Reproduction Page #1 Warm Up Where are your genes located?

Mitosis

• Interphase

• Prophase

• Metaphase

• Anaphase

• Telophase

Page 75: Cell Reproduction Page #1 Warm Up Where are your genes located?

The Cell Cycle is Carefully Controlled

• Key check points which feedback signals from the cell will delay the next step

• Controlled by proteins!

1. Cell Growth CHECKPOINT (G1) – Start – Nerve/muscle cells stop here

2. DNA Synthesis CHECKPOINT (G2) – Enzymes

3. Mitosis CHECKPOINT – Back to G1 phase

Page 76: Cell Reproduction Page #1 Warm Up Where are your genes located?

Page #4When Control is Lost -- Cancer

• Cancer = Cell growth is uncontrolled - does not respond to control mechanisms.

• Causes: Mutations that cause over-production of growth molecules – (accelerator) or by in-activating proteins that slow or stop the cell cycle (brakes)

• Tobacco and UV radiation linked to increased cancer risk.

Page 77: Cell Reproduction Page #1 Warm Up Where are your genes located?

Change in Chromosome Number

• Trisomy = humans with more than 2 copies of chromosomes – improper development

• Karyotype = a photo of the chromosomes in a dividing cell.

• Disjunction = when egg/sperm cells form – each chromosome and homologue separate – sometimes one or more chromosomes fail to separate - unequal distribution.

• Down Syndrome - 3 copies of chromosome 21- NONDISJUNCTION

Page 78: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 79: Cell Reproduction Page #1 Warm Up Where are your genes located?

Change in Chromosome Structure

• Mutation – A change in an organism’s chromosomal structure.

• Deletion = piece of chromosome breaks off completely – lacks of a set of genes – fatal

• Duplication = chromosome fragment attaches to its homologous chromosome –two copies of a gene set

Page 80: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 81: Cell Reproduction Page #1 Warm Up Where are your genes located?

• Inversion = chromosome piece reattaches to original chromosome, but in reverse orientation.

• Translocation = chromosome piece reattaches to a nonhomologous chromosome.

Page 82: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 83: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 84: Cell Reproduction Page #1 Warm Up Where are your genes located?

Interphase

• Interesting things happen!1. Cell preparing to divide2. Genetic material doubles

Page 85: Cell Reproduction Page #1 Warm Up Where are your genes located?

Prophase

• Chromosome pair up!1. Chromosomes thicken and shorten

-become visible-2 chromatids joined by a centromere

2. Centrioles move to the opposite sides of the nucleus

3. Nucleolus disappears

Page 86: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 87: Cell Reproduction Page #1 Warm Up Where are your genes located?

Metaphase

• Chromosomes meet in the middle!

1. Chromosomes arrange at equator of cell

2. Become attached to spindle fibres by centromeres

3. Homologous chromosomes do not associate

Page 88: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 89: Cell Reproduction Page #1 Warm Up Where are your genes located?

Anaphase

• Chromosomes get pulled apart1. Spindle fibres contract pulling

chromatids to the opposite poles of the cell

Page 90: Cell Reproduction Page #1 Warm Up Where are your genes located?

Telophase

• Now there are almost two!1. Chromosomes uncoil2. Spindle fibres disintegrate3. Centrioles replicate

Page 91: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 92: Cell Reproduction Page #1 Warm Up Where are your genes located?

Cytokinesis

• Cell splits

Page 93: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://www.cellsalive.com/mitosis.htm

Page 94: Cell Reproduction Page #1 Warm Up Where are your genes located?

Metaphase

Page 95: Cell Reproduction Page #1 Warm Up Where are your genes located?

Telophase

Page 96: Cell Reproduction Page #1 Warm Up Where are your genes located?

Prophase

Page 97: Cell Reproduction Page #1 Warm Up Where are your genes located?

Anaphase

Page 98: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 99: Cell Reproduction Page #1 Warm Up Where are your genes located?
Page 100: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://www.youtube.com/watch?v=HV5kPiDYC3M

Page 101: Cell Reproduction Page #1 Warm Up Where are your genes located?

Cell Reproduction Cell Reproduction Page #5Page #5

Warm UpWarm Up

List the stages of mitosis in orderList the stages of mitosis in order

IPMATIPMAT

Page 102: Cell Reproduction Page #1 Warm Up Where are your genes located?

MeiosisMeiosis

Meiosis = Meiosis = Cell divisionCell division that produces only that produces only haploid cells (half the number of haploid cells (half the number of chromosomes)chromosomes)Sex cells or gametesSex cells or gametesSpermatogenesisSpermatogenesisOogenesisOogenesis

Page 103: Cell Reproduction Page #1 Warm Up Where are your genes located?

Meiosis Occurs in Two StagesMeiosis Occurs in Two Stages

Meiosis IMeiosis I

Meiosis IIMeiosis II

Follows the same order as MITOSIS, but it Follows the same order as MITOSIS, but it does it does it TWICETWICE

Page 104: Cell Reproduction Page #1 Warm Up Where are your genes located?

Meiosis IMeiosis I

Homologous chromosomes Homologous chromosomes are separated into are separated into separate separate cells.cells.

Page 105: Cell Reproduction Page #1 Warm Up Where are your genes located?

Interphase IInterphase I

Cell doubles its DNA and Cell doubles its DNA and then doubles it againthen doubles it again

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis1.html

Page 106: Cell Reproduction Page #1 Warm Up Where are your genes located?

Prophase IProphase I

Chromosomes formChromosomes formCrossing over takes placeCrossing over takes place

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis3.html

Page 107: Cell Reproduction Page #1 Warm Up Where are your genes located?

Crossing OverCrossing Over

Exchanging corresponding segments of Exchanging corresponding segments of DNADNA

Important because it gives a new Important because it gives a new combination of combination of genes.genes.

Page 108: Cell Reproduction Page #1 Warm Up Where are your genes located?

Crossing OverCrossing Overhttp://waynesword.palomar.edu/images/cross3.jpghttp://waynesword.palomar.edu/images/cross3.jpg

Page 109: Cell Reproduction Page #1 Warm Up Where are your genes located?

Metaphase IMetaphase I

Chromosomes line up Chromosomes line up in the in the middlemiddle..

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis4.html

Page 110: Cell Reproduction Page #1 Warm Up Where are your genes located?

Anaphase IAnaphase I

Chromosomes Chromosomes separateseparate

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/meiosis5.html

Page 111: Cell Reproduction Page #1 Warm Up Where are your genes located?

Telophase ITelophase I

Cell begins to divide Cell begins to divide & 2 new cells form & 2 new cells form (cytokinesis)(cytokinesis)

Each cell has Each cell has chromosomeschromosomes

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis6.html

Page 112: Cell Reproduction Page #1 Warm Up Where are your genes located?

Meiosis IIMeiosis II

ChromatidsChromatids of each chromosome are of each chromosome are separated into separate cellsseparated into separate cells

http://botit.botany.wisc.edu/images/130/Meiosis/Lilium_microsporogenesis/Meiosis_II.html

Page 113: Cell Reproduction Page #1 Warm Up Where are your genes located?

Prophase IIProphase II

Chromosomes form in Chromosomes form in both cellsboth cells

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis7.html

Page 114: Cell Reproduction Page #1 Warm Up Where are your genes located?

Metaphase IIMetaphase II

Chromosomes line up Chromosomes line up along middle of cellalong middle of cell

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis8.html

Page 115: Cell Reproduction Page #1 Warm Up Where are your genes located?

Anaphase IIAnaphase II

Chromosomes Chromosomes separate and are separate and are pulled apart into pulled apart into chromatidschromatids

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis9.html

Page 116: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://www.scq.ubc.ca/filter/wp-content/uploads/2007/10/sister-chromatid.gif

Page 117: Cell Reproduction Page #1 Warm Up Where are your genes located?

Telophase IITelophase II

Chromatids gather at Chromatids gather at ends of cellsends of cells

Cytokinesis occurs – Cytokinesis occurs – (cell splits apart)(cell splits apart)

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis10.html

Page 118: Cell Reproduction Page #1 Warm Up Where are your genes located?

End Result of Meiosis & End Result of Meiosis & CytokinesisCytokinesis

44 new cells each with new cells each with half as much half as much geneticgenetic info as the parentinfo as the parent

http://morgan.rutgers.edu/MorganWebFrames/Level1/Page7/Meiosis10.html

Page 119: Cell Reproduction Page #1 Warm Up Where are your genes located?

http://www.cellsalive.com/meiosis.htm

Page 120: Cell Reproduction Page #1 Warm Up Where are your genes located?

SpermatogenesisSpermatogenesis

http://www.soc.ucsb.edu/sexinfo/images/12-06-spermatogenesis.gif

Page 121: Cell Reproduction Page #1 Warm Up Where are your genes located?

OogenesisOogenesis

http://img.sparknotes.com/content/testprep/bookimgs/sat2/biology/0003/oogenesis.gif


Recommended