In pea seeds the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r) - Leaving Cert Agricultural Science - Question b - 2012
Question b
In pea seeds the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r).
A pea plant, homozygous for round seeds (RR), was crossed with a pea... show full transcript
Worked Solution & Example Answer:In pea seeds the allele for round seeds (R) is dominant over the allele for wrinkled seeds (r) - Leaving Cert Agricultural Science - Question b - 2012
Step 1
Gametes
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Answer
The gametes for the parents can be derived from their respective genotypes:
For round seed parent (homozygous): Gametes = (R) x (R)
For wrinkled seed parent (homozygous): Gametes = (r) x (r)
Step 2
Genotype of offspring (F1)
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Answer
The genotype of the offspring resulting from the cross of RR and rr is:
Genotype of offspring (F1) = (Rr)
Step 3
Phenotype of offspring (F1)
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Answer
The phenotype of the offspring is determined by the dominant allele:
Phenotype of offspring (F1) = round
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