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A man homozygous for unattached earlobes (E) marries a woman who has attached earlobes (e). What are the expected genotypes and phenotypes of their offsprings. Give the genotype and phenotype ratio.​

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In human beings, unattached or free (E) earlobes are dominant over attached earlobes​ (e).

Parents:  EE (male)    x      ee (female)

​Progeny:
Gametes E E
e Ee Ee
e Ee Ee

Expected phenotype: 100% chances of getting offspring with Unattached ear lobes (Ee).

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free ear lobes= F 
attached ear lobes= f 
parents gametes in a punnet square: 
as a result the  ratio is 1(attached ear lobe): 3 (free ear lobe) 

if both parents have attached ear lobes, they have to be homozygous 
(for the recessive trait to be shown phenotypically in this case it 
has to come in a double doze) thereby 100% chance of getting child 
with attached ear lobe.
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