Question

There are two different alleles for flower color, P and p. The image shows a white sweet pea with a genotypeo of pp.

mc020-1.jpg

What can you surmise from the labeled image?
The genotype is heterozygous.
White petal color is a recessive trait.
White petal color is a dominant trait.
The phenotype is heterozygous.

Answer 1

White petal color is a recessive trait.

Reason: the plant's genotype is pp (two recessive alleles), so the white phenotype is expressed only when the allele is homozygous recessive. It is not heterozygous (that would be Pp), and "phenotype is heterozygous" is incorrect (phenotype describes appearance, not genotype).