Set 2: Practice problems: Autosomal inheritance Use the following…
Question Set 2: Practice problems: Autosomal inheritance Use the following… Set 2: Practice problems: Autosomal inheritanceUse the following information to answer the questions below. Assume that each pair of alleles represents a different locus and that all of these loci are unlinked.A – free earlobes???P – polydactyl (extra digits)a – attached earlobes???p – normal five digitsW – “widow’s” peak???T – ability to taste a chemical called PTC (“taster”)w – straight hairline???t – non-tasterF – freckles presentf – no freckles1. If a woman and a man who are both heterozygous for freckles produce a child, what is the probability that it will not have freckles??????a.?0????d.?1/2b.?1????e.?3/4c.?1/4????f.?None of the above2. When both the husband and wife are polydactylous but each had one normal parent, what is the probability that they will have a polydactylous child?a.?0????d.?1/2b.?1????e.?3/4c.?1/4????f.?None of the above3. If a husband and wife are both heterozygous for the same dominant trait, what is the probability that they will have a child with a genotype identical to their own (for this locus)?a.?0????d.?1/2b.?1????e.?3/4c.?1/4????f.?None of the above4. If two parents are carriers of the same recessive trait (carriers are heterozygotes) and if they produce three normal children in a row, what is the probability that their fourth child will express the recessive trait (i.e., that he will be a homozygote)?a. ?1- all of them???d.?1/3b. ?3/4????e.?1/4c. ?1/2????f.?None of the above5. When both parents are carriers of the same recessive abnormality, what is the probability that any phenotypically normal child they produce will also be a carrier of the abnormality?a.?1/4????d.?2/3b.?1/3????e.?3/4c.?1/2????f.?None of the above6. If a woman and a man are both heterozygous for tasting PTC and having freckles, what is the probability that they will produce a child who is a taster with no freckles?a.?0????d.?1/32b.?1/4????e.?9/16c.?1/16????f.?None of the above7. If it were acceptable and practical to utilize the test cross procedure for genotype determination in humans, the appropriate tester to elucidate the genotype of a freckled male would be:a. his motherb. his sisterc. any female with frecklesd. any female without frecklese. any of the precedingPete and Repete are identical twins (the same genotype). Pete married a freckled woman with attached earlobes. They had two children: a daughter phenotypically like the mother and a son who has no freckles and free earlobes. Repete married an unfreckled woman with free earlobes. They had one child, a son with freckles and attached earlobes.Hint: Create a pedigree of Pete and Repete’s family then label each individual with as much information about genotypes as you can figure out from the setup. Then use the information you have to solve for the missing information.8. The phenotype of Pete and Repete was:a. freckles and free earlobesb. freckles and attached earlobesc. unfreckled and free earlobesd. unfreckled and attached earlobes9. The genotype of Pete and Repete was:a. FFAAb. FFAac. FfAad. Ffaae. None of the above10. The genotype of Pete’s wife was:a. FFAA?b. FFAa?c. FfAa d. Ffaa e. None of the above11. The genotype of Repete’s wife was:a. FfAab. Ffaac. ffAAd. ffaae. None of the above5. If a child has Type O blood but neither of her parents has Type O blood, what are the possible genotypes and phenotypes of her parents? Biology Science Microbiology BIOL 210 Share QuestionEmailCopy link Comments (0)
