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 crosses two geraniums from the f1 generation. look at the punnett square to see this cross. which ratio of red - to - white flowering plants would she expect to see in the phenotypes of the f2 generation? 2 red : 2 white 3 red : 1 white all red 1 red : 3 white

Explanation:

Step1: Analyze genotypes in Punnett - square

The genotypes from the cross are RR:Rr:rr in a 1:2:1 ratio.

Step2: Determine phenotypes

Since RR and Rr result in red - flowered plants and rr results in white - flowered plants, the number of red - flowered plants is 1 (RR)+2 (Rr)=3, and the number of white - flowered plants is 1 (rr).

Answer:

3 red : 1 white