The R locus determines flower color in a new plant species. Plants that are genotype RR have red flowers, and plants that are rr have white flowers. However, Rr plants have pink flowers. What type of inheritance does this demonstrate for flower color in these plants?
A) complete dominance
B) incomplete dominance
C) codominance
D) complementation
E) lethal alleles

Question

Quizplus · Accepted Answer

This demonstrates incomplete dominance, where the heterozygous genotype (Rr) results in a phenotype (pink flowers) that is intermediate between the two homozygous phenotypes (red and white flowers).

The R Locus Determines Flower Color in a New Plant