16 If there are 2 alleles A and a one dominant and one reces

16. If there are 2 alleles A and a (one dominant and one recessive) and two heterozygotes mate what is the ratio of expected genotypes? What are the possible types of gametes that these individuals could make and in what ratio would they be produced? What is the ratio of expected phenotypes of their offspring?

17. If the 2 alleles in the question above were incompletely dominant, what would the expected ratio of genotypes and phenotypes be?

Solution

(16)

Answer:

P1= Aa x Aa

Gametes: A, a

F1= 1AA: 2Aa: 1 aa

3 dominant phenotype: 1 recessive phenotype