Question

Considering a dihybrid cross, what is the probability of the progeny being heterozygous at both the alleles?

(a) 1/16

(b) 4/16

(c) 7/16

(d) 9/16

The question was posed to me during an interview.

Question is taken from Dihybrid Cross topic in section Mendelian Genetics of Cytogenetics

Answer 1

Right choice is (b) 4/16

To elaborate: If you make a punett square the diagonal will have the progeny probability that are heterozygous for both alleles.