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Answer :
Sure! Let's go through the possible crosses to determine which one will produce 100% of a specific phenotype.
1. PW × PW:
- Here, both parents have one pink allele (P) and one white allele (W).
- The possible offspring combinations are: PP, PW, WP, WW.
- This means there will be a mix of phenotypes, so you won't get 100% of a single phenotype.
2. PP × PP:
- Both parents have two pink alleles (PP).
- All offspring will be PP because they inherit one allele from each PP parent.
- Therefore, 100% of the offspring will have the phenotype associated with PP.
3. WW × WW:
- Both parents have two white alleles (WW).
- All offspring will be WW since they get one W allele from each parent.
- As a result, 100% of the offspring will have the phenotype associated with WW.
4. PP × WW:
- One parent has two pink alleles (PP) and the other parent has two white alleles (WW).
- All of the offspring will be PW because they receive one P from the PP parent and one W from the WW parent.
- Therefore, 100% of the offspring will have the phenotype associated with PW.
Given these possibilities, the correct answer which will produce 100% of a phenotype is option 4: PP × WW.
1. PW × PW:
- Here, both parents have one pink allele (P) and one white allele (W).
- The possible offspring combinations are: PP, PW, WP, WW.
- This means there will be a mix of phenotypes, so you won't get 100% of a single phenotype.
2. PP × PP:
- Both parents have two pink alleles (PP).
- All offspring will be PP because they inherit one allele from each PP parent.
- Therefore, 100% of the offspring will have the phenotype associated with PP.
3. WW × WW:
- Both parents have two white alleles (WW).
- All offspring will be WW since they get one W allele from each parent.
- As a result, 100% of the offspring will have the phenotype associated with WW.
4. PP × WW:
- One parent has two pink alleles (PP) and the other parent has two white alleles (WW).
- All of the offspring will be PW because they receive one P from the PP parent and one W from the WW parent.
- Therefore, 100% of the offspring will have the phenotype associated with PW.
Given these possibilities, the correct answer which will produce 100% of a phenotype is option 4: PP × WW.
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