If Mr Doe is AaBbCc and Mrs Doe is AaBbCc and they have 20 c

If Mr. Doe is AaBbCc and Mrs. Doe is AaBbCc, and they have 20 children (wow), what is the number of children who will be:

a. the genotype AaBb and the phenotype A_cc?

b. the genotype AABb or the phenotype A_bb?

c. the genotype aaB_ and the phenotype aaC_?

d. the genotype A_B_ or the phenotype aaB_?

Solution

Trihybrid Cross

Eight types of gametes with all possible combinations will be produced and can be described in a Punnet square

PUNNET SQUARE with 64 combinants

Phenotypic Ratios

Number of children of

a) the genotype AaBb is 4 and the phenotype A-cc is 3

b) the genotype AABb is 2 and the phenotype A-bb is 3

c) the genotype aaBb is 2 and aaBB is 1

the phenotype aaC- is 3

d) the genotype A-B- is 2 and the phenotype aaB- is 3