4.1.1 In the schematic representation above, identify the parent with a red phenotype - NSC Agricultural Sciences - Question 4 - 2019 - Paper 2
Question 4
4.1.1 In the schematic representation above, identify the parent with a red phenotype. Give a reason for the answer.
4.1.2 In the schematic representation above, id... show full transcript
Worked Solution & Example Answer:4.1.1 In the schematic representation above, identify the parent with a red phenotype - NSC Agricultural Sciences - Question 4 - 2019 - Paper 2
Step 1
Identify the parent with a red phenotype. Give a reason for the answer.
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Answer
The parent with a red phenotype is the female, represented as 'R R' in the parental generation. This is because the genotype 'R' expresses the red phenotype, indicating that this parent can pass on the dominant red trait.
Step 2
The ratio of the phenotype in the F2 generation
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Answer
The ratio of phenotypes in the F2 generation is 3:1, where 3 represents red phenotypes (RR and Rr) and 1 represents the black phenotype (rr).
Step 3
The ratio of the genotype in the F2 generation
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Answer
The ratio of genotypes in the F2 generation is 1:2:1, which includes 1 homozygous dominant (RR), 2 heterozygous (Rr), and 1 homozygous recessive (rr).
Step 4
The phenotype of the F1 generation
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Answer
The phenotype of the F1 generation is red, as all offspring inherit at least one dominant allele (R) from the parental generation.
