In guinea pigs, the allele for short hair is dominant. A. Fill in the genotype o

Question

In guinea pigs, the allele for short hair is dominant. A. Fill in the genotype of heterozygous short haired guinea pig _______ B. Fill in the genotype of a long haired guinea pig ________ A man is heterozygous for brown eyes A. What is his genotype (use symbols)? ________ B. What 2 types of gametes (sperm) can he produce with respect to the gene for eye color? ________ C. What percentage of the sperm will carry an allele for blue eyes? ________ Albinism (lack of fur pigment) is a recessive trait. Albino raccoons are white, genotype aa. A heterozygous female is mated to a male who also has heterozygous genotype. Show work for full credit. A. show the mating cross B. what is the phenotype of the female and male parents? C. what is the chance of an albino raccoon in the offspring?

Explanation / Answer

Question 2

Short hair ----------ALLELE-DOMINANT -----------S

LONG hair ----------ALLELE-RECESSIVE -----------s

A.   HETEROZYGOTE -------- Short hair –GUINEA PIG –GENOTYPE---------------Ss

A.   HomoZYGOTE -------- long hair –GUINEA PIG –GENOTYPE---------------ss

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Question 3

brown eyes---------- ----------ALLELE-DOMINANT -----------B

blue eyes ----------ALLELE-RECESSIVE -----------b

A    . A man is heterozygous for brown eyes---------- heterozygous. (Bb)

B . 50% OF GAMTES CARRIES B (brown eyes)ALLELE

50% OF GAMTES CARRIES b (blue eyes)ALLELE

C. 50%

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Question 3

PARENTS:

Heterozygote Aa   x Heterozygote Aa

A

a

A

AA

Aa

a

Aa

Albino--------- aa

A heterozygous PIGMENTED genotype =Aa

A homozygous PIGMENTED genotype =AA

A homozygous Albino-- genotype = aa

homozygous Albino =1/4=25%

A

a

A

AA

Aa

a

Aa

Albino--------- aa

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