Dive into the world of knowledge and get your queries resolved at IDNLearn.com. Our community provides accurate and timely answers to help you understand and solve any issue.
Sagot :
To determine the expected ratio of yellow seeds to green seeds in the offspring of a cross between a heterozygous plant (Yy) and a homozygous recessive plant (yy), we can use a Punnett square to visualize the possible genotypes of the offspring.
1. Define the Genotypes of the Parents:
- Parent 1: Yy (heterozygous for yellow seeds)
- Parent 2: yy (homozygous recessive for green seeds)
2. Set up the Punnett Square:
The Punnett square helps us determine all possible combinations of the alleles from the parents.
| | y | y |
|---|---|---|
| Y | Yy| Yy|
| y | yy| yy|
Each cell in the table represents a possible genotype for the offspring.
3. Determine the Genotype of the Offspring:
From the Punnett square, we can see the genotypes of the offspring:
- Yy (yellow seeds)
- yy (green seeds)
- The genotypic combinations occur in these quantities:
- 2 Yy (yellow) offspring
- 2 yy (green) offspring
4. Determine the Phenotype Ratios:
- Yellow seeds (Yy): 2 offspring
- Green seeds (yy): 2 offspring
Therefore, the ratio of yellow seeds to green seeds is \(2:2\).
5. Simplify the Ratio:
- The ratio \(2:2\) can be simplified to \(1:1\).
Thus, the expected ratio of yellow seeds to green seeds in the offspring is \(2:2\).
Hence, the correct answer is:
A. [tex]\(2:2\)[/tex]
1. Define the Genotypes of the Parents:
- Parent 1: Yy (heterozygous for yellow seeds)
- Parent 2: yy (homozygous recessive for green seeds)
2. Set up the Punnett Square:
The Punnett square helps us determine all possible combinations of the alleles from the parents.
| | y | y |
|---|---|---|
| Y | Yy| Yy|
| y | yy| yy|
Each cell in the table represents a possible genotype for the offspring.
3. Determine the Genotype of the Offspring:
From the Punnett square, we can see the genotypes of the offspring:
- Yy (yellow seeds)
- yy (green seeds)
- The genotypic combinations occur in these quantities:
- 2 Yy (yellow) offspring
- 2 yy (green) offspring
4. Determine the Phenotype Ratios:
- Yellow seeds (Yy): 2 offspring
- Green seeds (yy): 2 offspring
Therefore, the ratio of yellow seeds to green seeds is \(2:2\).
5. Simplify the Ratio:
- The ratio \(2:2\) can be simplified to \(1:1\).
Thus, the expected ratio of yellow seeds to green seeds in the offspring is \(2:2\).
Hence, the correct answer is:
A. [tex]\(2:2\)[/tex]
We greatly appreciate every question and answer you provide. Keep engaging and finding the best solutions. This community is the perfect place to learn and grow together. For precise answers, trust IDNLearn.com. Thank you for visiting, and we look forward to helping you again soon.