exam - 1 All of the following statements are true except A...

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1) All of the following statements are true except: A) DNA synthesis happens during mitosis. B) All cells come from a preexisting cell. C) Mitosis and cytokinesis are required for asexual reproduction. D) Mitosis produces new nuclei with exactly the same chromosomal endowment as the parent nucleus. E) Mitosis may occur without cytokinesis. 2) The centromere is a region in which 3) A cell containing 92 chromatids at metaphase of mitosis would, at its completion, produce two nuclei containing how many chromosomes? 4) If there are 20 centromeres in a cell, how many chromosomes are there? 5) A duplicated chromosome typically has how many molecules of DNA?
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A) 1 B) 2 C)4 D)8 E)thousands 6)New DNA is made during what part of the cell cycle? 7) If a cell has 8 chromosomes at metaphase of mitosis, how many chromosomes will it have during anaphase? 8) The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this? 9) During which phase(s) of mitosis do we find chromosomes composed of two chromatids? A) from metaphase through telophase
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B) from G2 of interphase through metaphase C) from anaphase through telophase D) from G1 of interphase through metaphase E) from interphase through anaphase 10) What is a genome? 11) Which of the following is true of a species that has a chromosome number of 2n = 16? 12) The X and the Y chromosomes are called sex chromosomes because A) they are present only when cells undergo meiosis. B) genes located on these chromosomes play a role in determining the sex of the individual. C) females have X chromosomes and males have Y chromosomes. D) they are formed only as a result of fertilization. E) the number of Y chromosomes determines the sex of the individual.
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