Pea plant 1 and pea plant 2 both produce yellow seeds. A test cross of pea plant

Question

Pea plant 1 and pea plant 2 both produce yellow seeds. A test cross of pea plant 1 produces 53 progeny plants with yellow seeds and 51 progeny plants with green seeds. A test cross of pea plant 2 produces progeny plants that all have yellow seeds.

1. If pea plant 1 is self-fertilized, what would be the genotypic ratio of the progeny (*** alleles must be denoted correctly according to the conventions in chapter 3***)?

2. If pea plant 1 is self-fertilized, what would be the phenotypic ratio of the progeny?

3. If pea plant 1 is self-fertilized, what is the probability of a progeny plant having yellow seeds and being true-breeding for this phenotype?

4. If pea plants 1 and 2 are crossed, what would be the genotypic ratio of the progeny (*** alleles must be denoted correctly according to the conventions in chapter 3***)?

Explanation / Answer

The pea plant 1 is said to have heterozygous gene for the seed color, Yy

upon self fertilization   

1. The genotypic ratio will be 1:2:1

2. The phenotypic ratio will be 1:3

3. The probability of a progeny plant having yellow seeds and being true-breeding for this phenotype is 1/4.

4. Cross between YY and Yy will produce a genotypic ratio of 1:1, the cross is shown below.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.