VOO III IV Cystic fibrosis (CF) is a rare lethal recessive genetic disorder caused by a number of mutations in a single gene where CF is dominant and cf is recessive (i.e. an affected individual would be cfcf). Imagine you are a genetic counselor advising a couple who both have a history of Cystic Fibrosis in their families. In order to assess the risk of having a child with CF genotype: cfcf for this couple, you must first determine the probable genotypes of their family members. In the pedigree above, solid black shapes represent affected individuals with CF and open shapes represent non-affected individuals. What is the genotype of individual 11-4? 1/3 CFCF, 2/3 CFcf, 1/2 CFcf, 1/2 CFCF, OCFcf, Ocfcr.

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