In pea plants yellow seeds are dominant to green seeds. A plant with green seeds cross at the plant that is heterozygous. What are the alleles?
What are the genotypes of the parents?
What are the F1 genotypes?
F1 phenotypes?

The correct answer is -

1. Y (yellow) and y (green)

2. Yy (yellow dominant) and yy (green)

3. Two heterozygous yellow (Yy) and two green recessives (yy)

4. 50% Yellow and 50% green plant

Explanation:

In the given question, it is given that a pea plant has two alleles for the trait yellow seeds and green seeds, the alleles for the traits are green (y) and Y for the dominant trait.

The cross between the green seed (yy) pea plants, is recessive and heterozygous which means a combination of dominant and recessive are as follows:

    Y       y

y    Yy    yy

y   Yy   yy

Here two heterozygous yellow seeds and two recessive green seed plant offspring.

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