PRACTICE EXAM - PRACTICE EXAM #1 BSC 2011 - Summer 2006 _...

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PRACTICE EXAM #1 BSC 2011 - Summer 2006 Name: ____________________________________ Instructions: Read each question and all answers carefully before answering. Questions that you may have seen before have probably been rewritten in significantly different ways. Choose the best answer for each. Work at a steady pace, and you should have ample time to finish. ------------------------------------------------------------------------------------------------------ 1) Which of the following is true of a species that has a chromosome number of 2n = 16? A) The species is diploid with 32 chromosomes. B) The species has 16 sets of chromosomes. C) There are 16 homologous pairs. D) During the S phase of the cell cycle there will be 32 separate chromosomes. E) A gamete from this species has 8 chromosomes. 2) Which of the following is the term for a human cell that contains 22 autosomes and an X chromosome? A) an unfertilized egg cell B) a sperm cell C) a male somatic cell D) a female somatic cell E) Both A and D are correct. 3) How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis? A) They have twice the amount of cytoplasm and half the amount of DNA. B) They have half the number of chromosomes and half the amount of DNA. C) They have the same number of chromosomes and half the amount of DNA. D) They have half the number of chromosomes and one-fourth the amount of DNA. E) They have half the amount of cytoplasm and twice the amount of DNA. 4) Recombinant chromosomes are the result of A) crossing-over. B) environmental factors such as radiation and carcinogenic chemicals. C) mutations. D) separation of homologous chromosomes in metaphase I of meiosis. E) incorrect pairings of DNA nucleotides. 5) Which of the following happens at the conclusion of meiosis I? A) Homologous chromosomes are separated. B) The chromosome number is conserved. C) Sister chromatids are separated. D) Four daughter cells are formed. E) The sperm cells elongate to form a head and a tail end. 6) Centromeres of sister chromatids uncouple and chromatids separate.
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This note was uploaded on 03/30/2010 for the course BSC BSC2011 taught by Professor Evans during the Spring '10 term at École Normale Supérieure.

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PRACTICE EXAM - PRACTICE EXAM #1 BSC 2011 - Summer 2006 _...

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