| December 4, 2015

Two parents who are each known to be carriers of an autosomal recessive allele have four children. None of the children has the recessive condition.

What is the probability that two or more of the children are the carriers of the recessive allele?

(To calculate this type of probability, you must consider all possible birth orders of carriers. For example, if a question asked what is the probability the one of two children is a carrier, there are two possible orders: 1) first child is a carrier, second child is not a carrier 2) first child is not a carrier, second child is a carrier. Calculate the probability of each possible occurance and add the probabilities together to get the overall chance that one child is a carrier. )

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Category: Biology

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