F09 Bio1010 Exam Microbiology

C the dominant allele prevents the expression at the

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Unformatted text preview: n bacteria, cell division typically occurs via binary fission, yielding two (2) genetically identical daughter cells. B. In eukaryotes, mitotic cell division yields two (2) genetically identical daughter cells. C. In eukaryotes, meiotic cell division yields four (4) genetically identical daughter cells. D. Cell division is involved in healing and regeneration processes of multicellular organisms. Fig. 4 – Chromosomes before Meiosis 28. You are working with a 2n = 4 organism. The above figure shows allele arrangements on the chromosomes just before Meiosis I. If normal crossing over occurs, which of the following would be possible going into metaphase I? Option 1 A. B. C. D. E. Option 2 Option 3 Only Option 1. Crossing over only occurs between same regions (with Only Option 2 alleles of same genes) of homologous chromosomes Only Option 3 More than one of the options (1 through 3) above would be possible. None of the above options (1 through 3) would be possible. 9 29. In the case where a particular gene has one allele that is dominant while the other is recessive, which of the following is true? A. The recessive allele is less common in the general population compared to the dominant allele. B. It will not be possible to observe a phenotypic difference between the homozygote for the dominant allele and the heterozygote. C. The dominant allele prevents the expression (at the transcriptional level) of the recessive allele in heterozygous individuals. D. Individuals who are homozygous for the recessive allele will exhibit less fitness than heterozygotes or individuals homozygous for the dominant allele. 30. Which of the following is NOT a recognized way in which genetic diversity can arise? A. B. C. D. E. horizontal gene transfer in bacteria crossing over in meiosis of eukaryotes fusion of different gametes in sexual reproduction mutation in bacteria and eukaryotes vertical gene transfer in bacteria Bacterial cell division produces identical daughter cells - vertical gene transfer does not introduce diversity here. 31. Which of the following (in A through D) is/are NOT directly involved in the process of translation? A. B. C. D. E. ribosome. mRNA...
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This note was uploaded on 05/19/2011 for the course BIOL 1010 taught by Professor Anafi/quinlan during the Spring '08 term at York University.

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