Mendel observes a pea plant with yellow seeds, where A and a are the alleles for color, but he knows nothing else about the plant. Which of the following must he infer is the possible genotype(s) of this plant?
A) AA only
B) AA or aa
C) Aa only
D) AA or Aa

Question

Quizplus · Accepted Answer

Since the plant has yellow seeds, it must have at least one dominant allele (A). Therefore, the possible genotypes are either homozygous dominant (AA) or heterozygous (Aa).

Mendel Observes a Pea Plant with Yellow Seeds, Where a and a Are