High School

We appreciate your visit to In carnations the alleles for flower color exhibit incomplete dominance Red flowers have the RR genotype Pink flowers have the RW genotype White flowers have. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

In carnations, the alleles for flower color exhibit incomplete dominance. Red flowers have the RR genotype. Pink flowers have the RW genotype. White flowers have the WW genotype.

If two pink flowers are crossed, what is the expected genotypic ratio of their offspring?

A. 1 RR : 2 RW : 1 WW
B. 2 RR : 0 RW : 2 WW
C. 0 RR : 4 RW : 0 WW
D. 3 RR : 0 RW : 1 WW

Answer :

Final answer:

When two pink carnation flowers with the RW genotype are crossed, the expected genotypic ratio of their offspring is 1 RR:2 RW:1 WW, showing one part red, two parts pink, and one part white flowers.

Explanation:

In a situation where incomplete dominance is observed, such as in the case of carnation flower color inheritance, a cross between two pink flowers (RW x RW) would produce offspring with the genotypic ratio of 1:2:1. Specifically, the genotypic ratio for the offspring would be 1 RR:2 RW:1 WW, correlating to the phenotypic ratio of red, pink, and white flowers respectively.

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