IA MODIFIED MASTERING BIOLOGY WITH E TEX
IA MODIFIED MASTERING BIOLOGY WITH E TEX
12th Edition
ISBN: 9780136781752
Author: Urry
Publisher: PEARSON
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Chapter 14, Problem 14.4CR

Both members of a couple know that they are carriers of the cystic fibrosis allele. None of their three children has cystic fibrosis, but any one of them might be a carrier The couple would like to have a fourth child but are worried that he or she would very likety have the disease, since the first three do not. What would you tell the couple? Would it remove some uncertainty from their prediction if they could find out whether the three children are carriers?

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Jan and Michael are both carriers for the cystic fibrosis allele. If Jan and Michael have three children with the disease and then Jan becomes pregant with fratnernal twins, what is the probability that both twins will also have the disease?
Hemophilia is a sex-linked recessive trait. A male hemophiliac and phenotypically normal female have a son with hemophilia.  They would like to have one more child. What is the probability of having a child without hemophilia? Explain using a Punnett square.   Is it possible for a girl to be born with hemophilia? Explain.
Jan and Michael are both carriers for the cystic fibrosis allele. If Jan and Michael have five children, what the probability that three or more of the children will have the disease?

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IA MODIFIED MASTERING BIOLOGY WITH E TEX

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