AP BIOLOGY

Detailed explanation-1: -In pea plants, like in the example above, if the dominant allele for purple flowers is present in the genotype, then the phenotype would be purple. Even if the genotype had one purple color allele and one recessive white color allele, the phenotype would still be a purple flower.

Detailed explanation-2: -Therefore, the presence of atleast one P allele will give purple colour (dominant phenotype) to the flower. Thus, the PP is a homozygous dominant genotype. Hence, the phenotype of PP is purple colour.

Detailed explanation-3: -P is dominant to p, so offspring with either the PP or Pp genotype will have the purple-flower phenotype. Only offspring with the pp genotype will have the white-flower phenotype.

Detailed explanation-4: -These are exactly the same genotype. The other possible genotypes of the offspring are PP and pp. The combinations PP, PP, and pP have the same phenotype-purple flowers. This is because each contains at least one dominant allele (P).

Detailed explanation-5: -For example, a pea plant with the genotype big-P-big-P has the purple flowers phenotype, while a plant that’s small-p-small-p has white flowers. Generally speaking, true-breeding strains are homozygous. Mendel noticed that none of the individual traits blended in the offspring.