Suppose the banding pattern variation for chromosome 2 in butterflies arose in the given order. The ancestral chromosome is numbered 7654321. Identify which chromosomal modifications are responsible for the banding pattern changes observed in each of the novel chromosomes. 76543210 Translocation Answer Bank Duplication Translocation 73265410 Duplication Inversion 73265411 Deletion 7365411 Inversion 7345611 Duplication 73345611 Deletion Mutation
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Suppose the banding pattern variation for chromosome 9 in butterflies arose in the given order. The ancestral chromosome is numbered 7654321. Identify which chromosomal modifications are responsible for the banding pattern changes observed in each of the novel chromosomes.
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Identify the chromosomal alteration based on its cytological and genetic effects. Cytological Features: - Shorter chromosomes with missing bands, an unpaired loop during meiotic pairing (heterozygous) - Longer chromosomes, unique pairing structures during meiosis (heterozygous) - banding, changes to the position of the centromere - banding, drastic changes to the size of chromosomes involved, changes to position of centromeres Genetic Features: - lethality (homozygous), low recombination frequencies and "pseudodominance" (heterozygous) - asymmetric pairing and unequal crossing-over events during meiosis - lacks viable crossover products and decreases recombination frequency of flanking genes (heterozygous) - establishment of new linkage relationships, semisterility (heterozygous) Answer Bank: - inversions - duplications - deletions - reciprocal translocations
Place the type of chromosomal mutation next to each set of chromosomes. The • represents the centromere. wild-type chromosome A B • C D E F G chromosomal mutation 1 A B • C D E F D E F G Answer Bank paracentric inversion that includes DEFG deletion of FG chromosomal mutation 2 A B • D E F C D E F G tandem duplication of DEF chromosomal mutation 3 A B • C D E displaced duplication of DEF pericentric inversion of BCDE chromosomal mutation 4 A B • C G F E D chromosomal mutation 5 A E D C • B F G
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