AP BIOLOGY

HEREDITY

MONOHYBRID CROSS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If all offspring of a cross have the genotype Aa, the parents of the crosses would most likely be
A
AA x aa
B
Aa x Aa
C
Aa x aa
D
AA x Aa
Explanation: 

Detailed explanation-1: -So, the correct answer is ‘All Aa’.

Detailed explanation-2: -No, if both parents are AA, the offspring will all be AA. For AS offspring, at least one parent must be AS.

Detailed explanation-3: -Two people are said to have compatible genotypes when there is no possibility of them birthing a child with sickle cell disease. Genotype AA is the universally compatible genotype that is, regardless of who they partner up with, there is no possibility of them birthing a child with sickle cell disease.

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