Discussion 3 Fall 2010 - Genetics (BIO 325) Fall 2010...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Genetics (BIO 325) Fall 2010 Discussion 3 _______________________________________________________________________ _ 1. The following pedigree concerns the autosomal recessive disease phenylketonuria (PKU). The couple marked A and B is contemplating having a baby but are concerned about the baby's having PKU. What is the probability of the first child having PKU? Unless you have evidence to the contrary, assume that a person marrying into the pedigree (i.e. not a descendant of the two parents at the top of the pedigree) is not a carrier. The filled-in individuals have PKU. 2. In a family, both parents are heterozygous at two loci that are involved in the autosomal recessive disorders cystic fibrosis (CF) and phenylketonuria (PKU). What is the probability that their first child will have either CF or PKU? 3. In a family, both parents are heterozygous for the autosomal recessive allele for albinism. They have two children. What is the probability that both children will be phenotypically identical (pigmented or albinos) with regard to skin color? 4. α -thallasemia, a form of anemia, is inherited in humans as a recessive trait. Two normal parents have a child affected with
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

Discussion 3 Fall 2010 - Genetics (BIO 325) Fall 2010...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online