THE CHROMOSOME SHUFFLEby Thomas Mueller - RHS & Larry FlammerShuffling chromosomes could be a way to promote speciation: the origin anddiversification of new species.Background: Please read!Anti-evolutionists suggest that evolution cannot be correct according to theirnaive understanding of genetics. When comparing a karyotype of a chimpanzeeor gorilla and a karyotype of a human side by side, we match the bandingpatternsof stained chromosomes as seen during meiosis under a microscope.It looks like two ancestral ape chromosomes fused to produce a human total of46 chromosomes.Gorillas and chimpanzees still have the ancestral 48 chromosomes. A PartialKaryotype:Human Chromosomes 1-4 compared to Chimpanzee chromosomes.(For each pair, the chromosome on the left is Human; while chromosome on right is chimpanzee)Anti-evolutionists remain unconvinced and argue there could never have been a fusion of two ape-ancestor chromosomes. They argue the karyotypes must have been established thisway from the moment they were created.Your task is to understand both arguments by reading the following article:THE CHROMOSOME SHUFFLE (Adapted from Carl Zimmer as posted on his scienceblog at Discover Magazine,29 August 2005) The CHROMOSOME SHUFFLE: DiscussionIn each Alpha-Analogy, ∅= Centromere location.
The original gene sequence is ABCDEF∅GHIJKLMNOPQRSTUVWXYZ. Another chromosome reads, αβγ∅δεζη.For each TERM below, follow steps a-b. a. Find the Description that best fits that definition; place its letter to the right of that TERM in column D. (D = letters only)b. Find the Alpha Analogy that best fits that definition; place its number on the same line in the AA column. (AA = numbers only)TERMDDescriptionAAAlpha Analogy duplication (tandem repeat)DA. piece of one chromosome is exchanged with part of another chromosome21. ABCDEF∅GHLKJIMNOPQRSTUVWXYZ reciprocal translocationAB. piece of chromosome is removed62.
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