50% of the progeny is going to have the Ee genotype after both people mate.
Let us take the genotype for having no ear lobes be e.
Similarly, the genotype for having ear lobes is going to be E.
This means that whoever is homozygous for no ear lobes will have the genotype ee.
Whoever is homozygous for ear lobes will have the EE genotype.
After a person with the ee genotype mates with a person having the EE genotype, their offspring will have the genotypes - (EE, Ee, Ee, ee)
From this, we can conclude that 50% of the progeny is going to have the Ee genotype.
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