term%20test%202%20with%20answers%202007

term%20test%202%20with%20answers%202007 - Name: _ Date: _...

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Name: __________________________ Date: _____________ 1. DNA sequences that serve as binding sites for proteins regulating transcription and are often found adjacent to a gene are said to be: A) cross-reacting. B) cis-acting. C) trans-acting. D) origins of transcription. E) transcription factors. 2. The garden pea has a diploid number (2 n ) of 12. How many chromosomes would be expected in a tetrasomic? A) 8 B) 14 C) 16 D) 24 E) 48 3. A man heterozygous for a disease gene D is also heterozygous for an RFLP (morph-1, morph-2) linked at a distance of 4 map units from the disease gene. His chromosomal arrangement is D morph-1 d morph-2 What percentage of his sperm will be D morph-2 ? A) 50 % B) 46 % C) 25 % D) 4 % E) 2 % 4. What is the formula for LOD score calculation? A) LOD = ln 2 [ P(linkage) / P(no linkage)] B) LOD = ln 2 [ P(no linkage) / P(linkage)] C) LOD = log 10 [ P(linkage) / P(no linkage)] D) LOD = log 10 [P(no linkage) / P(linkage)] E) LOD = log 10 P(linkage) + log 10 P(no linkage) Page 1
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5. What is silencing of a gene due to? A) quenching of an activator B) methylation of histones C) methylation of DNA D) acetylation of histone tails E) acetylation of CpG islands 6. Plant species A (n = 7) produces a fertile hybrid when crossed to species B (n = 10). What is the likely number of chromosomes in the fertile hybrid? A) 7 B) 10 C) 14 D) 17 E) 34 7. In general, which one of the following usually has a greater chance of lethality than the others? A) inversion B) duplication C) deletion D) translocation E) all have an equal chance 8. During mitosis, if the chromosomes in a diploid tissue fail to separate after replication, the resulting daughter cells will be: A) monoploid. B) tetrasomic. C) triploid. D) tetraploid. E) haploid Page 2
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A plant species that had been subjected to radiation for a long time in order to produce chromosomal mutations was then inbred until it was homozygous for all of those mutations. It was then crossed to the original unirradiated plant, and meiosis of the F 1 hybrids was examined. It was noticed that a cell with a dicentric chromosome and a fragment occurred at a low frequency in anaphase I of the hybrid. What kind of chromosomal mutation occurred in the irradiated plant? A) paracentric inversion B) pericentric inversion C) reciprocal translocation D) Robertsonian translocation E) microdeletion 10. In a testcross of a female Drosophila heterozygous for three linked, recessive genes, the following phenotypes of progeny were obtained : a+ b+ d 466 a b d+ 470 a+ b d+ 11 a b+ d 13 a+ b d 19 a b+ d+ 20 a+ b+ d+ 0 a b d 1 What is the interference value? A) 0 B) 0.1 C) 1 D) -1 E) 6.5 11. An event in which the centromeric regions of two non-homologous acrocentric chromosomes become fused to form a singular centromere is known as a(n. A) reciprocal translocation.
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This note was uploaded on 11/04/2009 for the course BIOLOGY 211 taught by Professor Monica during the Fall '08 term at Windsor.

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term%20test%202%20with%20answers%202007 - Name: _ Date: _...

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