The color of a flower is controlled by two alternative alleles at a single locus,R (red)and r (white).If an individual has the Rr alleles,it is considered to be
A)homozygous dominant with a red color.
B)heterozygous with a red color.
C)heterozygous with a white color.
D)homozygous recessive with a white color.

Question

Quizplus · Accepted Answer

The Rr genotype indicates that the individual has one copy of the R allele and one copy of the r allele. Since R is dominant over r, the presence of the R allele will result in a red color phenotype. However, since there is also one copy of the recessive r allele, the individual is heterozygous and carries the potential to pass on the r allele to offspring.

The Color of a Flower Is Controlled by Two Alternative