Humans carry two alleles for earlobe shape E for freehanging

Humans carry two alleles for earlobe shape: E for free-hanging earlobes and e for attached earlobes. Considering that free-hanging earlobes are dominant to attached earlobes, please draw a Punnett Square in the space below crossing a heterozygous individual with free-hanging earlobes with an individual with attached earlobes and include what the percentage of the offspring is homozygous dominant, homozygous recessive, heterozygous, attached earlobes and free-hanging earlobes.

Solution

Answer:

Ee( free-hanging earlobes) x ee (attached earlobes)

E, e e ----------------------gametes

homozygous dominant : homozygous recessive : heterozygousfree-hanging earlobes

0 : 1 : 1