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GENETICS REVIEW

• A diagram used to

predict the

outcomes of a

genetic cross.

• Punnet Square

• An alternate form of the

same gene for a given trait.

• Allele

Traits that are

controlled by two or

more genes.

Often show a wide variety of

phenotypes.

Example: Human skin color

• Polygenic Traits

The heterozygous

phenotype is a mixture

of both of the parent’s

phenotypes.

Example:

Red flowers = RR

White flowers = rr

Pink flowers = Rr

• Incomplete Dominance

• Law of Independent

Assortment

Genes for different traits can

separate independently from

each other when forming

gametes (sperm and egg).

• The scientific study

of heredity.

• Genetics

• When both alleles

for a trait are the

same. (SS or ss)

• Homozygous

• The physical

characteristics of

an organism.

(ex. Tall or short)

• Phenotype

• The alleles from each

parent are separated

during the formation

of gametes

(sperm and egg).

• Segregation

• Sperm and Egg

• Gametes

(in the game of love)

When both alleles for

a trait are different. (Ss)

• Heterozygous

• The form of a trait that

is typically covered up

by the dominant allele.

• Resessive Trait

• The passing of traits

from parents to offspring.

• Heredity

• The expressed form

of a trait that usually

covers up the recessive

allele.

• Dominant

Genes that have more

than two possible

alleles.

Example: Human blood type

Three alleles exist:

A, B, and O

• Multiple Alleles

A specific characteristic

that varies from one

individual to another.

• Trait

A segment of DNA that

can be thousands to

millions of base pairs

long and codes for a trait.

•Gene

Both alleles are

expressed at the same

time in an organism.

Example: Hair color in cattle

Red hair = RR

White hair = WW

Roan (red & white hair) = RW

• Co Dominance

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Regular Dominance,

Co Dominance, or Incomplete

Dominance?

Meiosis

FALSE; crossing over exchanges the DNA

so genetic information is new and different

TRUE or FALSE

After prophase I, sister chromatids are

identical

S2C06 Jeopardy Review

http://www.life.uiuc.edu/plantbio/102/lectures/08mit&veg102.html

Meiosis

Tetrads form and crossing over occurs

S2C06 Jeopardy Reviewhttp://www.life.uiuc.edu/plantbio/102/lectures/08mit&veg102.html

Tell how prophase I is different from

mitosis

A pair of homologous Chromosomes very

close together about to undergo crossing over

What is a tetrad?

S2C06 Jeopardy Review

Meiosis

Meiosis

Diploid

Cells that have 2 copies of each

chromosome are called:

S2C06 Jeopardy Review

Meiosis

MITOSIS

What type of cell division makes

diploid cells?

S2C06 Jeopardy Review

Meiosis

MITOSIS

Which type of cell division is

used by somatic cells to repair

injuries

S2C06 Jeopardy Review

Which type of cell division is

used to produces 4 haploid

gametes?

Meiosis

MEIOSIS

S2C06 Jeopardy Review

Meiosis

Homologous Chromosomes

S2C06 Jeopardy Review

What are these

chromosomes called?

What is the Law of Independent Assortment?

Pairs of genes separate freely of each other when forming sperm and egg (gametes)….

Your kids could have your mom’s big lips and your dad’s small teeth, your mom’s short height and your dad’s strong legs…..

Your sperm and eggs (gametes) will have different combinations of genes than even you or your parents have….. (CRAZY!)