Minions eiher have one eye or two eyes. One eye (E) is dominant to two eyes (e).
ID: 58407 • Letter: M
Question
Minions eiher have one eye or two eyes. One eye (E) is dominant to two eyes (e). Suppose a female minion with two eyes is crossed with a male minion with one eye. The male minions mother had two eyes.
a.What are the genotypes of the parents
b. What gametes will be produced be each parent?
c. What will genotypes do you expect in the F1 generation?
d. With what frequency do you expect two eyed minions do you expect in the F1 generation?
e. These parents have 9 offspring. What is the likelihood 2 have one eye and therefore 7 have two eyes? (in any order)?
Explanation / Answer
a.What are the genotypes of the parents?
Female parent genotype = ee
Male parent genotype = Ee
b. What gametes will be produced be each parent?
Female gametes with 1:1 ratio of homozygous and heterozygous and males with hemizygous are produced
c. What will genotypes do you expect in the F1 generation?
1:1 genotypes of Ee and ee
d. With what frequency do you expect two eyed minions do you expect in the F1 generation?
50% chance of being carrier ( normal 'X 'from father) and 50% chance of getting both the allele affected in case of females and all the males will be affected due to hemizygosity. In sex linked recessive trait males are more likely to be affected. Therefore in F1 generation the expected two eye minions are of 50%.
e. These parents have 9 offspring. What is the likelihood 2 have one eye and therefore 7 have two eyes? (in any order)?
The probability of a female having the affected genotype (homozygous 'e')= P(ee)
The probability of a male having the affected genotype (hemizygous 'e') = P(e)
Assuming allele frequencies are same in both
two females with heterozygous allele have one eye (Ee)
Three males with hemizygous allele have two eyes (e)
Four females with homozygous allele have two eyes (ee)