QUESTION 1 The fitness of the 3 genotypes at a biallelic locus containing allele

Question

QUESTION 1

The fitness of the 3 genotypes at a biallelic locus containing alleles F and D are wFF=0.1, wFD=0.8, and wDD=0.8. Which allele is dominant?

F

D

They are co-dominant

Impossible to tell

QUESTION 2

The fitness of the 3 genotypes at a biallelic locus containing alleles F and D are wFF=0.1, wFD=0.8, and wDD=0.8. Is allele F the result of a beneficial, deleterious or neutral mutation?

Beneficial

Deleterious

Neutral

Impossible to tell

QUESTION 3

Calculate the selection coefficient for the WW genotype given the following information.

Mean number of offspring for XX= 82

Mean number of offspring for XW= 65

Mean number of offspring for WW= 25

QUESTION 4

A single gene controls the production of estrogen. High estrogen in mammals increases fertility, but also increases cancer. Alleles that confer high estrogen production may be favored in environments that have high predation, whereas alleles that confer low estrogen production may be favored in environments with low predation. This is an example of:

Frequency-dependent selection

Variable selection in time and space

Antagonistic Pleiotropy

Co-evolution

QUESTION 5

The frequency of the h allele in the sperm of cats that are heterozygous at the H locus has been found to be 75%. This is most likely an example of:

Self-incompatibility

Meiotic Drive

Frequency dependent selection

Assortative Mating

F

D

They are co-dominant

Impossible to tell

Explanation / Answer

1. D is dominant. Though fitness and dominance are not directly related. But selection has greater role.

2. Deleterious, that's why homo state has lesser fitness, whereas the allele is safe in hetero state

4.Variable selection in time and space

5. Meiotic drive, because its more that expected 50%.

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