Question

With green pods as a dominant trait over yellow, which of the following crosses will result in all progeny having yellow pods?

(a) Homozygous green and homozygous yellow

(b) Heterozygous green and heterozygous green

(c) Homozygous yellow and homozygous yellow

(d) Homozygous green and homozygous green

The question was posed to me during an online interview.

My question is from Inheritance of One Gene-1 topic in portion Principles of Inheritance and Variation of Biology – Class 12

Answer 1

Right option is (c) Homozygous yellow and homozygous yellow

The best explanation: Yellow being recessive will express only when both alleles are present. That occurs only when both parents can contribute an allele encoding for the yellow pod. For all progeny to have yellow pods, both parents have to be homozygous for yellow pods.