HEREDITY
CODOMINANCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ai x ii
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AA x ii
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BB x Ai
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BB x ii
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Detailed explanation-1: -Remember, because type O blood results from the homozygous recessive genotype (i i ), the only way to produce a type O child is if both parents provide an O allele (i ).
Detailed explanation-2: -Even though both parents still have blood type A, Dad can pass on either his A or his O gene version. Mom can also either pass on her A or her O. Because of this, you can see that there’s 1 in 4 or 25% chance for a child to have OO, or blood type O.
Detailed explanation-3: -If mom passes her O and so does dad, then the child will be OO which is O type blood. Each parent has a 50% chance of passing down the O gene. So each child has a 25% chance of ending up with an O blood type.
Detailed explanation-4: -For example, two O blood type parents can produce a child with only O blood type. Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type.