Carnations exhibit incomplete dominance in their flower color. The red (R) allele is incompletely dominant to the white allele (W). When red carnations are crossed with white carnations, all the F1 offspring are pink (RW). What would be the probable offspring in the F2 generation if the pink carnations were allowed to self-fertilize?

Question

Carnations exhibit incomplete dominance in their flower color. The red (R) allele is incompletely dominant to the white allele (W). When red carnations are crossed with white carnations, all the F1 offspring are pink (RW). What would be the probable offspring in the F2 generation if the pink carnations were allowed to self-fertilize?

A. 50% red, 50% white
B. 75% red, 25% white
C. 100% pink
D. 25% red, 25% white, 50% pink

Answer 1

D. 25% red, 25% white, 50% pink

Explanation: In incomplete dominance, the heterozygous genotype (RW) produces an intermediate phenotype (pink). When the pink carnations are self-fertilized, the possible genotypes and phenotypes in the F2 generation would be: 25% RR (red), 25% WW (white), and 50% RW (pink).