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Imagine that twins are separated at birth.One is raised speaking only English,whereas the other is raised in a bilingual household and speaks both English and Spanish.Years later,the twins meet and decide to learn French together.The bilingual twin has a remarkably easy time learning French,whereas the other twin struggles.This difference may be explained by


A) codominance.
B) incomplete dominance.
C) multiple-allele inheritance.
D) multifactorial inheritance.
E) polygenic inheritance.

F) C) and D)
G) B) and E)

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A person with the blood type A can donate to which types? And receive blood from which types?


A) only A;only A
B) A and AB;only A
C) A,AB,and O;A,AB,and O
D) A and AB;A,AB,and O
E) A and AB;A and O

F) A) and E)
G) D) and E)

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If a human zygote is aneuploid,it has


A) fewer than 46 chromosomes.
B) more than 46 chromosomes.
C) exactly 46 chromosomes.
D) fewer or more than 46 chromosomes.
E) fewer,more than,or exactly 46 chromosomes.

F) A) and D)
G) A) and E)

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A man with severe familial hypercholesterolemia (FH) has three children with a woman who does not have the condition at all.Which of the following is a correct proportion of their potential offspring?


A) 100% will not have FH
B) 25% will have mild FH
C) 100% will have severe FH
D) 50% will have severe FH
E) 100% will have mild FH

F) B) and E)
G) None of the above

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