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Fill a the Punnett Square. Big ears are dominant over small ears; the two possible alleles...

Fill a the Punnett Square. Big ears are dominant over small ears; the two possible alleles are B and b. The parents have the following genotypes. Parent 1: Bb and Parent 2: bb. Describe the genotype of each parent.
Identify the ratio for the phenotypes that are possible in the progeny.

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Answer #1

Parent 1 is heterozygous Bb. So the phenotype is big ears as the dominant phenotype gets expressed in heterozygous conditions.

Parent 2 is homozygous recessive bb. So the phenotype is small ears as the recessive phenotype is expressed in homozygous conditions.

The cross between these parents produces a 1:1 ratio of big and small ears offsprings respectively.

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