If the probability of having a boy equal to that of having a girl, what is...

If the probability of having a boy equal to that of having a girl, what is the probability of a couple having a baby that is albino if they are both heterozygous?

a) What is the probability that they have a baby girl that is albino?

What if their first cheild is an albino girl, what his is the probability that their second child is a normal male?

Solutions

Expert Solution

When both the parents are heterozygous, they are Aa.

The probability that they can have a baby that is albino is:

Aa x Aa

Hence, the probability is 1/4 or 25%.

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The probability of having a girl or a boy is 1/2.

So, to have an albino girl, it would be 1/4 + 1/2 which is 2/6 or 1/3.

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The probability of having a girl or a boy is 1/2.

The probability of having a normal (not a carrier) would be 1/4.

So, the probability of having a normal male would be 2/6 or 1/3.

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If it is the probability of being phenotypically normal (AA, Aa), it would be:

1/2 + 3/4

This would give 4/6 or 2/3.

gladiator answered 1 year ago

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