Question

The F1 generation is determined by crossing P/P with p/p. Then the progeny obtained from them were intercrossed. What will be the ratio of pure breeding flowers to not pure breeding flowers in F2?

(a) 3:1 pure: non- pure

(b) 1:3 pure: non- pure

(c) 1:1 pure: non- pure

(d) 1:2 pure: non- pure

I have been asked this question in an internship interview.

Asked question is from Monohybrid Cross in portion Mendelian Genetics of Cytogenetics

Answer 1

Right option is (c) 1:1 pure: non- pure

To explain: Both homozygous dominant and homozygous recessive will be pure breeding. Thus the probability of pure: heterozygous will be 1:1.