Question

If a true breeding tall pea plant is crossed with a true breeding short pea plant, what will be the phenotype of the F1 generation?

(a) All short

(b) All tall

(c) 3:1 short: tall

(d) 1:3 short: tall

I have been asked this question at a job interview.

I'm obligated to ask this question of Monohybrid Cross topic in chapter Mendelian Genetics of Cytogenetics

Answer 1

Correct choice is (b) All tall

To explain I would say: In this case tall is the dominant trait. Then all the F1 progeny will be heterozygotes where the dominant phenotype tall is expressed.