In a certain species, the allele for long tails (L) is dominant over the allele

Practice Questions

In a certain species, the allele for long tails (L) is dominant over the allele for short tails (l). If a long-tailed individual is crossed with a short-tailed individual, what is the expected genotype of the offspring if the long-tailed individual is heterozygous?

LL
Ll
ll
LL or Ll

Questions & Step-by-Step Solutions

Step 1: Identify the alleles. The long tail allele is L (dominant) and the short tail allele is l (recessive).
Step 2: Determine the genotypes of the parents. One parent is heterozygous (Ll) and the other is homozygous recessive (ll).
Step 3: Set up the cross. We will cross Ll (long-tailed) with ll (short-tailed).
Step 4: Use a Punnett square to find the possible genotypes of the offspring. The top of the square will have Ll and the side will have ll.
Step 5: Fill in the Punnett square. The combinations will be Ll (from L and l) and ll (from l and l).
Step 6: Analyze the results. The offspring can either be Ll (long-tailed) or ll (short-tailed).
Step 7: Conclude the expected genotype of the offspring. The expected genotypes are Ll and ll, but the question asks for the expected genotype, which is Ll.

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In a certain species, the allele for long tails (L) is dominant over the allele

Practice Questions

Questions & Step-by-Step Solutions

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