Question

If A represents the dominant gene and a represents its recessive allele, which of the following would be most likely result in the first generation offspring when Aa is crossed with aa?

• A. All will exhibit dominant phenotype
• B. All will be of recessive type
• C. Dominant and recessive phenotype with 50% each
• D. Dominant phenotype will be 75%

Answer 1

The correct option is C Dominant and recessive phenotype with 50% each

A represents the dominant gene and a represents its recessive allele. The most likely result in the first generation offspring when Aa is crossed with aa will be:

Dominant phenotype = Aa
Homozygous recessive phenotype = aa

Dominant (Aa) : Recessive (aa) = 1 : 1