Question

tall pea plant results from a dominant tall allele. A short phenotype requires that an individual has two recessive alleles. A short pea plant (pp) is crossed with a tall pea plant (Pp).
What is the frequency of short offspring (pp) from this crossing?

0.25
0.75
1.0
0.5

Answer 1

0.5

Cross pp × Pp gives gametes p (from pp) and P or p (from Pp). Offspring: 50% Pp (tall) and 50% pp (short).