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12. The pedigree shown is owing a certain that is not linked IV Which individuals are expected to have essentially the same Y
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Answer #1

II-1, III-1 and IV-1 will have same Y chromosome.

  • In case of “I-1, II-7 and III-9”- same Y chromosome will be present in I-1, II-7 but III-9 will have chromosome inherited from II-5
  • In case of “I-1, II-5 and III-9”- same Y chromosome will be present in II-5 and III-9, but I-1 will have different Y chromosome
  • Since pedigree has record of mating with male individuals having genotype other than pedigree in consideration, all men will not have identical Y chromosomes
  • In case of “II-5, III-8 and IV-3”- same Y chromosome will be present in II-5 and III-8, but IV-3 will have different Y chromosome inherited from III-4
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