Question

A plant with purple flowers (PP) is crossed with a plant with white flowers (pp), resulting in offspring with all purple flowers.

The allele for purple color is____.

Answer 1

allele for purple color is dominant.

Step-by-step explanation:

allele for purple color is dominant.

PP represents a homozygous dominant genotype, meaning both alleles are dominant for purple.

pp represents a homozygous recessive genotype, meaning both alleles are recessive for white.

When crossed, each parent contributes one allele to the offspring.

The dominant purple allele (P) from the PP parent is able to mask the recessive white allele (p) from the pp parent.

Therefore, all offspring will inherit at least one dominant purple allele (Pp) and will have purple flowers.

This scenario demonstrates the principle of incomplete dominance, where one allele completely masks the expression of the other. In this case, the dominant purple allele fully suppresses the recessive white allele, resulting in purple flowers in all offspring.