Question

multiple choice 20 points
if one parent is homozygous dominant (aa) and the other parent is heterozygous (aa) what is the probability their offspring will display
the recessive trait?
100%
50%
0%
25%

Explanation:

Step1: Analyze Parent Genotypes

Parent 1: AA (homozygous dominant), so it can only pass on 'A'.
Parent 2: Aa (heterozygous), can pass on 'A' or 'a'.

Step2: Create Punnett Square

	A	A
a	Aa	Aa

Step3: Determine Offspring Genotypes

Offspring genotypes: AA, AA, Aa, Aa. All have at least one 'A' (dominant allele).

Step4: Check for Recessive Trait

Recessive trait is expressed only with 'aa'. None of the offspring have 'aa', so probability of recessive trait is 0%.

Answer:

0% (Option: 0%)