To determine the probabilities of offspring seed colors, we first need to establish the genotypes of the parental plants being crossed.
- Heterozygous yellow pea plant: This plant has one yellow seed allele (Y) and one green seed allele (y), so its genotype is Yy.
- Homozygous green pea plant: This plant has two green seed alleles (y), so its genotype is yy.
Next, we can use a Punnett square to visualize the potential offspring from this cross.
| | Y | y | |-------|----|----| | y | Yy | yy | | y | Yy | yy |
From the Punnett square, we can see the possible genotypes of the offspring:
- Yy: This genotype is for yellow seeds because the yellow allele is dominant. We have 2 instances of this genotype.
- yy: This genotype is for green seeds because it has the recessive alleles. We have 2 instances of this genotype.
Now, we can calculate the probabilities:
- Probability of Yellow Seeds (Yy): 2 out of 4 = 50%
- Probability of Green Seeds (yy): 2 out of 4 = 50%
- There are no yellow-green seeds in this cross, as yellow-green seeds would require a different combination of alleles.
Now we can fill in the response areas:
- Yellow Seeds: 50% (C)
- Green Seeds: 50% (C)
- Yellow-Green Seeds: 0% (A)
So, the completed response area would look like this:
Response area
- Yellow Seeds: 50%
- Green Seeds: 50%
- Yellow-Green Seeds: 0%
The correct placement of probabilities would be:
- Blank space 1 (Yellow Seeds): 50%
- Blank space 2 (Green Seeds): 50%
- Blank space 3 (Yellow-Green Seeds): 0%
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