Pedigrees - PEDIGREE ANALYSIS Name 1 Why is it customary to...

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PEDIGREE ANALYSIS Name: ______________________________ 1. Why is it customary to use pedigrees to determine inheritance patterns in humans? as opposed to conducting experiments like those by Mendel or Morgan? 2. Read pages 166-167 in the text and note the characteristics that allow one to make distinctions between the following modes of inheritance. Autosomal Recessive Autosomal Dominant X-Linked Recessive X-Linked Dominant 3. What are the various symbols used in a pedigree? Make an exhaustive key.
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4. For the following pedigrees determine which mode of inheritance is most likely. Label the mode of inheritance in the space provided, and then explain the logic that you used to determine that it WAS one type of inheritance and NOT another type of inheritance. Similarly, once you have determined the mode of inheritance, label the genotypes of as many individuals that you know for sure using the R and r alleles. It is important to note that if you don’t know the genotype with certainty don’t label it with the most probable (you can label one R_). Also, if it is x-lined then the possible alleles will be X R , Xr, Y.
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