To determine which of the children are tasters, we need to recall that the trait for being a taster is dominant. In other words, if a child has at least one "T" allele, they will exhibit the taster phenotype.
Let's analyze the given data for each child:
- Child 1: Genotype "Tn"
- Since this child has one "T" allele, they are a taster.
- Child 2: Genotype "nn"
- This child has two "n" alleles, meaning they do not have the dominant "T" allele, so they are a nontaster.
- Child 3: Genotype "Tn"
- Similar to Child 1, this child also has one "T" allele, meaning they are a taster.
- Child 4: Genotype "nn"
- Identical to Child 2, this child has two "n" alleles and thus is a nontaster.
Given this analysis:
- Child 1 is a taster.
- Child 2 is a nontaster.
- Child 3 is a taster.
- Child 4 is a nontaster.
Therefore, the children who are tasters are:
- Child 1
- Child 3
The correct response is:
- Child 1
- Child 3
