What can be the outcome of ectopic recombination between copies of an active transposable element (L1) in the human genome? O inversions O duplications O deletions O reciprocal translocations O All answers are correct
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Inversions: Recombination between two copies of the transposable element on the same chromosome but in opposite orientations can lead to an inversion of the intervening sequence. Duplications: Unequal crossing over during recombination can result in one chromosome Show more…
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Adi S.
What results from unequal crossing over between homologous chromosomes? duplication on one chromosome deletion on one chromosome reciprocal translocation an inversion on both chromosomes Both (a) and (b) occur but not (c) or (d) answers (a). (b), (c) and (d) are all possible results Which of the following crosses will produce progeny whose germ cells will produce an unpaired loop at metaphase of meiosis I? cross between strain homozygous for chromosomal deletion and wild type strain: cross between strain homozygous for chromosomal duplication and wild type strain. cross between strain homozygous for reciprocal translocation and wild type strain: cross between strain homozygous for an inversion and wild type strain. all the answers are correct Only answers (a) and (b) are correct: Only answers (c) and (d) are correct:
Sri K.
1. Which kind of chromosomal rearrangement always results in a loss of some genetic material? A. Duplication. B. Inversion. C. Translocation. D. Deletion. 2. What is a common repair strategy to re-align misaligned chromosomes? A. Duplication of one of the chromosomes to replace the misaligned one. B. Formation of a loop. C. Delete the misaligned portion. D. Exchange the misaligned segments with aligned segments. 3. A Robertsonian Translocation results in: A. One fragmented chromosome. B. Down Syndrome. C. One large metacentric chromosome. D. All of these choices are correct. 4. In a Robertsonian Translocation, the formation of viable gametes depends on: A. Homologous chromosomes forming a cross-like structure. B. None of these choices is correct. C. Whether Prophase I was started. D. How the chromosomes separate. 5. Generally, how do translocation and crossover differ? A. Translocation occurs in Anaphase I, whereas crossing-over occurs in Prophase I. B. All of these choices are correct. C. Translocation is only non-reciprocal, whereas crossing-over is only reciprocal. D. Translocation is the movement of genetic material between nonhomologous chromosomes, whereas crossing-over occurs between homologous chromosomes.
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