practice_final_exam_key

practice_final_exam_key - Biological Sciences 101 Dr Mark...

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Biological Sciences 101 Dr. Mark Sanders Practice Final Exam Key 1a. The pedigree includes Sandra’s parents in generation I and Sandra and Sam in generation II. The blood types and presence or absence of nail-patella syndrome are as indicated in the problem. The alleles for ABO are written as I A , I B , and I, and the nail- patella alleles are N (the dominant mutant allele) and n (the wild type recessive allele) 1b. I B N/in 1c. I A n/I B n 1d. 3/8. There is a one half probability that each child produced by Sandra and Sam will have nail patella syndrome. Each combination of phenotypes among three children occurs with a probability of (1/2) 3 = 1/8. There are three different birth orders that contain one unaffected and two affected children, thus 3[(1/2) 3 ] = 3/8. 1e. Sandra I B N = 0.45 in = 0.45 I B n = 0.05 iN = 0.05 I A n I A I B Nn I A inn I A I B nn I A iNn = 0.5 0.225 0.225 0.025 0.025 Sam I B n I B I B Nn I B inn I B I B nn I B iNn = 0.5 0.225 0.225 0.025 0.025 The probability the first child of Sandra and Sam is blood type A and has nail patella
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practice_final_exam_key - Biological Sciences 101 Dr Mark...

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