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.

Question

An experiment shows that pea plants containing an allele for wrinkled seeds may still produce round seeds.

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

Answer 1

Based on the information given, we can conclude that the allele for wrinkled seeds in pea plants is D. recessive.

This conclusion is drawn from the observation that the presence of an allele for wrinkled seeds does not prevent the production of round seeds, which suggests that the round seed phenotype is dominant over the wrinkled seed phenotype. Therefore, the allele for wrinkled seeds must be recessive.