Question

in pea plants, purple flower color (p) is a dominant allele while white flower color (p) is recessive allele .if a pea plant has the genotype Pp what is it's phenotype explain your answer?

Answer 1

Answer: The phenotype is a purple flower color.

Reasoning: If the dominant allele is present in the genotype, dominant traits will be expressed in the phenotype. Organisms that are heterozygous or homozygous dominant for a certain gene will always express that gene. Since this pea plant has the genotype Pp, the dominant allele (purple flower color) will be shown.

Answer 2

The pea plant with a heterozygous genotype (Pp) will have a purple phenotype.

• According to Gregor Mendel, two alleles are responsible for the expression of a trait encoded by the gene.

• One allele of gene has the ability to mask the phenotypic expression of the other. The allele that masks another is called dominant allele while the allele being masked is the recessive allele.

• In this case, a gene that codes for flower color in pea plants is involved. The purple allele (P) is dominant over the white allele (p).

• Therefore, in a pea plant with heterozygous genotype (Pp), the purple allele will dominate and be expressed over the white color.

• Therefore, pea plant with a heterozygous genotype (Pp) will have a purple phenotype.

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