Bios%20100%20Fall%202008%20Test%203

Bios%20100%20Fall%202008%20Test%203 - Bios 100 Fall 2008...

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Bios 100 Fall 2008 Test 3 1. What are homologous chromosomes? a. chromosomes that are similar in shape, size and gene content b. similar chromosomes that are found in different individuals of the same species c. the two “threads” in a replicated chromosome (i.e., they are identical copies) d. the products of crossing over, which contain a combination of segments from maternal chromosomes and segments from paternal chromosomes. e. chromosomes from different species that have similar functions 2. What is a tetrad? a. The “X” that forms when chromatids from homologous chromosomes cross over b. a group of four chromatids produced when homologs synapse c. the four points where homologous chromosomes touch as they synapse d. the group of four genetically identical daughter cells produced by meiosis e. the four chromosomes that line up along the middle of a cell during mitosis in a diploid individual 3. What is genetic recombination? a. The synapsing of homologs during prophase of meiosis I b. the new combination of maternal and paternal chromosome segments that results when homologs cross over c. the new combination of chromosomal segments that results when outcrossing occurs d. the combination of a haploid phase and a diploid phase in a life cycle e. the exact duplication of chromosomes that occurs during mitosis 4. Meiosis II is similar to which process? a. mitosis in haploid cells b. nondisjunction c. outcrossing d. meiosis I e. mutational restriction 5. What is meant by a paternal chromosome? a. the largest chromosome in a set b. a chromosome that does not replicate correctly in meiosis I c. the member of a homologous pair that was inherited by the mother d. the member of a homologous pair that was inherited by the father e. the section of a chromosome that crosses over to produce a completely new chromosome
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6. What is chromatin? a. the protein core of the nucleosome, which consists of histones b. the 30 nm fiber c. the DNA-protein complex found in eukaryotes d. the histone and non-histone proteins in eukaryotic cells e. the pieces of chromosome that “cross over” during meiosis 7. The gene that codes for the protein p53 is a. a gene associated with tumor formation when its product does not function b. a gene associated with tumor formation when its product functions normally c. a gene that accelerates the cell cycle and leads to uncontrolled cell growth d. a gene that codes for a specific transcription factor involved in tumor formation e. a gene that is critical in the initiation of meiosis II 8. Which of the following statements about enhancers is correct? a. they form a unique base sequence called a TATA box b. they are located only in 5’ flanking regions c. they are located only in introns d. they are found in a variety of locations and are functional in any orientation e. they are crucial in the initiation of meiois I 9. What is alternative splicing? a.
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This note was uploaded on 03/06/2011 for the course BIOS 100 taught by Professor Kelso during the Spring '07 term at Ill. Chicago.

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Bios%20100%20Fall%202008%20Test%203 - Bios 100 Fall 2008...

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