Question

There are two types of pea plants: those that produce round seeds and those that produce wrinkled seeds. A single gene controls which type of seed a pea plant will produce.

An experiment shows that pea plants containing an allele for round seeds will always produce round seeds.

Based on this information, we can conclude that the allele for round seeds in pea plants is _______.
A.
recessive
B.
dominant
C.
heterozygous
D.
homozygous

Answer 1

B. dominant

Explanation: A dominant allele expresses the trait whenever it is present (even in heterozygous individuals). Recessive alleles only show their trait when present in two copies. Heterozygous and homozygous describe genotypes, not the allele's dominance.