Question

which of the following phenotypes is an example of polygenic inheritance? white and purple flower color in peas pink flowers in snapdragons skin pigmentation in humans the abo blood group in humans

Explanation:

• White and purple flower color in peas: This is an example of Mendelian inheritance (dominant - recessive), controlled by a single gene.
• Pink flowers in snapdragons: This is an example of incomplete dominance, where the heterozygous phenotype is intermediate between the two homozygous phenotypes, and it is controlled by a single gene pair.
• Skin pigmentation in humans: It is controlled by multiple genes (polygenic inheritance). Different combinations of alleles from these genes result in a wide range of skin color phenotypes.
• The ABO blood group in humans: This is an example of multiple - allele inheritance (a single gene with more than two alleles), not polygenic.

Answer:

skin pigmentation in humans