HW #04 - Homework Assignment #4 PDF

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Homework Assignment #4...

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Name: Connor Morris Homework #4, Due in recitation Feb 18 or 19, 2016 1. (3 points) The primrose, Primula kewensis has 36 chromosomes that are similar in appearance to the chromosomes in two related species, Primula floribunda (2n=18) and Primula verticallata (2n=18). a) What process is likely to have produced Primula kewensis? Allopolyploidy - the two similar species Primula floribunda and Primula verticallata hybridize when the haploid ovum of the first species is fertilized by the sperm of the second species. b) What two genetic terms would accurately describe Primula kewensis? Amphidiploid, allotetraploid

2. (3 points) A woman has already had two miscarriages, and seeks genetic counseling. It is discovered that she has a reciprocal translocation between chromosomes 12 and 22. a) What is a one sentence genetic explanation for her miscarriages? Normal chromosomes exist, but deletions and duplications create deficient chromosomes in meiosis half of the time. b) What fraction of her pregnancies will result in phenotypically normal, live-born children, and why?...