High School

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A horticulturist wants to produce geraniums with specific characteristics. She knows that the trait of red flowers is governed by the allele R, and the trait of white flowers is governed by the allele r.

The horticulturist crosses two geraniums from the F1 generation. Look at the Punnett square to see this cross. What ratio of red to white flowering plants would you expect to see in the phenotypes of the F2 generation?

Answer :

Answer:

3 red : 1 white

Explanation:

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Rewritten by : Barada

Answer:

Ration of red to white flowering plants in the phenotypes of the F2 generation is 3:1

Explanation:

Let us suppose that in the F1 generation, true breeding species were crossed with each other.

True breeding red flower geraniums will have genotype "RR"

And true breeding white flower geraniums will have genotype "rr"

Also, let us say that "R" is dominant over "r"

Then the offspring produced in F1 generation are -

RR * rr

Rr, Rr, Rr, Rr

All offspring are heterozygous red

F2 generation cross

Rr * Rr

RR, Rr, Rr, rr

Out of four , 3 offspring are red in color and one is white in color.

Thus, ration of red to white flowering plants is 3:1