Question

read the scenario and answer both parts.
in humans, attached earlobes are a recessive trait.
part a
a man and a woman both have free earlobes. each has one parent with attached earlobes.
what are the most likely genotypes of the man and the woman?
○ man: ee, woman: ee
○ man: ee, woman: ee
○ man: ee, woman: ee
○ man: ee, woman: ee

Explanation:

Step1: Define trait genetics

Let $E$ = dominant (free earlobes), $e$ = recessive (attached earlobes). Attached earlobes genotype = $ee$.

Step2: Analyze parent contribution

Each person has one $ee$ parent, so they must inherit one $e$ allele.

Step3: Match phenotype to genotype

Both have free earlobes (dominant trait), so they need one $E$ allele. Thus, genotype is $Ee$.

Answer:

Man: Ee, Woman: Ee