The diagram below is of a Punnett square for the cross between two heterozygous flowers, Rr and Rr.
Image
Assuming the flowers in this cross display complete dominance, and the allele, R, is dominant for a red pigment and the allele, r, is recessive for a white pigment, what percent of the offspring will have red flowers?
A.
100%
B.
25%
C.
75%
D.
50%
C. 75%
In this Punnett square, the possible genotypes are RR, Rr, and rr. The genotype RR will result in red flowers, while the genotypes Rr and rr will both result in red flowers due to the complete dominance of the R allele.
Therefore, 3 out of the 4 possible genotypes (75%) will result in red flowers in the offspring.