Jaden is six years old.His sister Hillary has the autosomal recessive condition neuronal ceroid lipofuscinosis that affects learning and coordination.Their parents are healthy.The probability that Jaden is a homozygote for the wild type allele of the gene that causes the condition is
A) 1/8.
B) 1/4.
C) 1/3.
D) 2/3.
E) 0.
Correct Answer:
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