Question

In pea plants, flower color is determined by the p gene. purple flowers are dominant to white flowers. what is the correct annotation for the genotype of a plant with white flowers?

group of answer choices
a. pp homozygous recessive
b. all of the above
c. are its genotype white flowers

Answer 1

The correct annotation for a pea plant with white flowers is 'pp homozygous recessive', as purple is dominant over white. A Punnett square is used to predict offspring genotypes, and for a dihybrid cross, a 16-square grid is needed.

Step-by-step explanation:

The correct annotation for the genotype of a plant with white flowers is pp homozygous recessive. In pea plants, flower color is determined by the P gene with purple flowers being dominant to white flowers. Therefore, the phenotype of white flowers is expressed only when both alleles are recessive, hence the genotype pp.

In a genetic cross involving pea plant flower color, the Punnett square is a tool used to predict genotypes and phenotypes. For example, if you cross a pea plant with the genotype PpYY (purple flowers, yellow peas) with a plant with genotype ppYy (white flowers, yellow peas), you'll need a 16-square Punnett square to analyze the cross (4x4 grid). This is due to each parent having two different traits with two alleles each (dihybrid cross). The possible offspring from such a cross would exhibit different combinations of the dominant and recessive alleles, resulting in various genotypes and phenotypes.