AP BIOLOGY

Detailed explanation-1: -A person with Ee will therefore be called a heterozygous genotype, with an unattached earlobe phenotype. If one of the parents is homozygous dominant (EE), the chances of their having a child with unattached earlobes is 100 %, because this parent has only a dominant allele (E) to pass on to the offspring.

Detailed explanation-2: -A single “E” allele in the genotype will result in the brown-eyed phenotype, even if the parent harbors a recessive “e” allele as well. The parents conceive a child. The child has blue eye. This tells us that the child is homozygous recessive, or “ee”, because only two recessive alleles can produce blue eyes.

Detailed explanation-3: -A hybrid organism is one that is heterozygous, which means that is carries two different alleles at a particular genetic position, or locus.