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Which process allows sexually reproducing organisms to create gametes with half the number of...

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Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? M itosis Meiosis Fertilization Reproduction 25% 25% 25% 25% 1.Mitosis 2.Meiosis 3.Fertilization 4.Reproduction
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Page 1: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Which process allows sexually reproducing organisms to create gametes with half the

number of chromosomes of the body cells?

Mito

sis

Meiosis

Ferti

lization

Reproducti

on

25% 25%25%25%1. Mitosis2. Meiosis3. Fertilization4. Reproduction

Page 2: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

A branch cut off of a geranium plant grows into a new plant. Will the new plant be different

from its parent plant?

yes,

because

m...

yes,

because

m...

no, beca

use m

e...

no, beca

use th

...

25% 25%25%25%1. yes, because mitosis will take place in the new plant

2. yes, because meiosis will take place in the old plant.

3. no, because meiosis and fertilization did not take place.

4. no, because the new plant was formed from gametes.

Page 3: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Cats have many different possible coat colors. What does this show?

muta

tions occu

...

repro

duction i..

.

division of b

o...

varia

tion in s.

..

25% 25%25%25%1. mutations occurring in sexually reproducing organisms

2. reproduction in asexually reproducing organisms

3. division of body cells in adult organisms

4. variation in sexually reproducing organisms

Page 4: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

What is true of asexual reproduction? Offspring that

are identica

l ...

rese

mble their.

..

are quite diff

...

are random and...

25% 25%25%25%1. are identical to their parents.

2. resemble their parents.

3. are quite different that their parents.

4. are random and can have different results each time.

Page 5: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

What is the result of a single cell going through the process of meiosis?

one identica

l ...

two id

entical ..

.

thre

e identica

...

four g

amete ce...

25% 25%25%25%1. one identical new cell

2. two identical new cells

3. three identical haploid bodies

4. four gamete cells

Page 6: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

What is an advantage of asexual reproduction?

the offsp

ring ...

the offsp

ring ...

there

are m

ore...

there

are fe

we...

25% 25%25%25%1. the offspring are not identical to their parents

2. the offspring are identical to their parents

3. there are more offspring produced

4. there are fewer offspring produced

Page 7: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Where are genes for sex-linked traits located?

They can be on...

On th

e “Y” c

hr...

On th

e “X” c

hr...

On ch

romoso

me ...

25% 25%25%25%1. They can be on any chromosome

2. On the “Y” chromosome

3. On the “X” chromosome

4. On chromosome pair # 21

Page 8: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

A white flower crossed with a red flower produces pink offspring. This is an example of incomplete dominance.

If two of the pink-flowered plants are crossed, what ratio will the genotypes of the offspring have?

1 RR: 3 Rr

1 RR: 2 Rr:

1 ...

2 Rw: 2 W

w

3 Rr: 1 rr

25% 25%25%25%

1. 1 RR: 3 Rr2. 1 RR: 2 Rr: 1 rr3. 2 Rw: 2 Ww4. 3 Rr: 1 rr

Page 9: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Why are blood types considered an example of codominance?

there

are fo

ur...

blood type O

c...

blood types A

...

there

are th

re...

25% 25%25%25%1. there are four types of blood, not two

2. blood type O can be donated to anyone, AB cannot

3. blood types A and B will both be expressed when present

4. there are three alleles for blood type and four types of blood

Page 10: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

How many pairs of homologous chromosomes do humans have?

4 22 46 52

25% 25%25%25%1. 42. 223. 464. 52

Page 11: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

If two different alleles are present, which allele is expressed?

Recessi

ve

Dominant

Phenotype

Genotyp

e

25% 25%25%25%1. Recessive2. Dominant3. Phenotype4. Genotype

Page 12: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

A tall pea plant (DD) and a tall pea plant (Dd) have what in common?

Phenotype

Genotyp

e

Alleles

Seed co

lor

25% 25%25%25%1. Phenotype2. Genotype3. Alleles4. Seed color

Page 13: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

In crossing homozygous dominant and homozygous recessive pea plants, Mendel noted that some genes were not seen in the F1 generation and were seen in

only 25% of the F2 generation. What did he call these genes?

Dominant

Recessi

ve

Leth

al

Inco

mpletely

d...

25% 25%25%25%

1. Dominant2. Recessive3. Lethal4. Incompletely

dominant

Page 14: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

One cat carries heterozygous, long-haired traits (Ss), and its mate carries homozygous short-haired traits (ss). What is the probability of one of their offspring

having long hair?

100%75%

50%25%

25% 25%25%25%1. 100%2. 75%3. 50%4. 25%

Page 15: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

A person with phenotype O blood has how many possible genotypes?

6 1 3 2

25% 25%25%25%1. 62. 13. 34. 2

Page 16: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Which pair of chromosomes produces a female offspring?

a female Y ch

r...

a female Y ch

r...

a female X ch

r...

a female X ch

r...

25% 25%25%25%1. a female Y chromosome and a male Y chromosome.

2. a female Y chromosome and a male X chromosome.

3. a female X chromosome and a male X chromosome.

4. a female X chromosome and a male Y chromosome.

Page 17: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Crossing a snap dragon that has red flowers with one that has white flowers produces a snap dragon with

pink flowers. The trait for flower color exhibits

Codominance

Inco

mplete dom...

Multi

ple allel...

Complete domin...

25% 25%25%25%1. Codominance2. Incomplete

dominance3. Multiple alleles4. Complete

dominance

Page 18: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

On which of the following chromosomes would a sex-linked trait most likely be

found?

X Y O YO

25% 25%25%25%1. X2. Y3. O4. YO

Page 19: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

An organism that has two identical alleles for the same trait is called _______ for that particular trait.

Homozy

gous

Hetero

zygo

us

Dominant

Recessi

ve

codominant

20% 20% 20%20%20%1. Homozygous2. Heterozygous3. Dominant4. Recessive5. codominant

Page 20: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

In a heterozygous individual the allele being expressed is

rece

ssive

.

mask

ed.

redundant.

dominant.

25% 25%25%25%1. recessive.2. masked.3. redundant.4. dominant.

Page 21: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Let P = purple flowers and p = white, and T = tall plants and t = dwarf. What would be the

appearance of a plant with the genotype PpTt?

purple flowers.

..

purple flowers.

..

white

flowers,...

white

flowers,...

pale purple fl...

20% 20% 20%20%20%1. purple flowers, tall2. purple flowers,

dwarf3. white flowers, tall4. white flowers, dwarf5. pale purple flowers,

intermediate height

Page 22: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

One of the main reasons genes sort independent of one another is that

they p

roduce

unrelated ...

they p

roduce

relate

d traits

.

they a

re on th

e same c.

..

they a

re diff

erent a

lleles.

they a

re on diff

erent c

...

20% 20% 20%20%20%1. they produce unrelated traits.

2. they produce related traits.

3. they are on the same chromosome.

4. they are different alleles.5. they are on different

chromosomes.

Page 23: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

A single gene has 3 or more alternative forms. These are called

hetero

zygote

s.

multi

ple allel...

homozygotes.

multi

ple zygo

t...

25% 25%25%25%1. heterozygotes.2. multiple alleles.3. homozygotes.4. multiple zygotes.

Page 24: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

When Mendel crossed two purple-flowered pea plants with each other, he obtained a

phenotypic ratio of 3:1 (purple pea plants to white pea plants). What are the parents?

homozygous d

om...

homozygous d

om...

hetero

zygous p

...

hetero

zygous p

...

25% 25%25%25%1. homozygous dominant purple pea

plant and homozygous recessive white pea plant

2. homozygous dominant purple pea plant and heterozygous white pea plant

3. heterozygous purple pea plant and homozygous dominant purple pea plant

4. heterozygous purple pea plant and heterozygous purple pea plant

Page 25: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

As a genetic counselor, you are constructing a human pedigree for a particular disease. You note that every generation shows the trait,

suggesting that it is

sex-l

inked.

rece

ssive

.

dominant.

cannot d

etermi...

25% 25%25%25%

1. sex-linked.2. recessive.3. dominant.4. cannot determine

from the information provided.

Page 26: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Gregor Mendel worked with what kind or plant?

Peas Corn

Wheat

Beans

25% 25%25%25%1. Peas2. Corn3. Wheat4. Beans

Page 27: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

Each alternative form of a gene for a certain trait is called a(n)?

Genotyp

e Alle

le

Phenotype

Recessi

ve trai...

25% 25%25%25%1. Genotype2. Allele3. Phenotype4. Recessive trait

Page 28: Which process allows sexually reproducing organisms to create gametes with half the number of chromosomes of the body cells? 1.Mitosis 2.Meiosis 3.Fertilization.

A woman who has type B blood marries a man who has type A blood. They have five children, all of which have type AB blood. What are the

most probable parental genotypes?

moth

er IBIB, f.

..

moth

er IBi ,

f...

Moth

er IBIB, f.

..

moth

er IBi, f

a...

25% 25%25%25%

1. mother IBIB, father IAIA

2. mother IBi , father IAi3. Mother IBIB, father

IAi4. mother IBi, father

IAIA


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