Question

A horticulturalist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R (RR and Rr) and the trait of white flowers is governed by the allele r (rr). The horticulturalist plans to cross a geranium that is homozygous for red flowers with a geranium that is homozygous for white flowers. Which Punnett square best describes that cross?

Answer 1

Answer:

Given,

RR and Rr = Red flower

rr = white flower

Homozygous condition means that both the alleles for the gene are either recessive or dominant alleles. Heterozygous condition means that one allele is recessive and other allele is dominant.

If a homozygous red flower geranium (RR) is crossed with a homozygous white flower geranium (rr), the Punnett square would be :

       R         R

r      Rr        Rr

r      Rr        Rr