BiSc Chapter 8 (Cellular Reproduction: Cells from Cells) – Flashcards
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A(n)_____ is an example of an organism that can sometimes reproduce asexually.
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Komodo Dragon
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Ordinary cell division produces two daughter cells that are genetically identical. This type of cell division is important for all of the following EXCEPT
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Production of sperm and eggs
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The chromosomes of eukaryotic cells are found in the
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Nucleus
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Chromatin consists of
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DNA and protein
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A duplicated chromosome consists of two
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Sister chromatids
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Sister chromatids are joined at the
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Centromere
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Which of the following occurs during interphase?
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Chromosome duplication
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The cell cycle results in the production of
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Two cells, each with the same amount of genetic material and the same genetic information
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Which of the following occurs during prophase?
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The mitotic spindle begins to form
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Which of the following is a stage of mitosis?
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Telophase
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The correct sequence of stages of mitosis is
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Prophase, Metaphase, Anaphase, Telophase
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During metaphase...
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Chromosomes line up in the middle of the cell
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Which of these events occurs during anaphase?
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Sister chromatids separate
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During telophase...
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The events of Prophase are reversed
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A cell that completed the cell cycle without undergoing cytokinesis would...
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Have two nuclei
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Cytokinesis typically begins during the ___ stage of mitosis
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Telophase
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What is the difference between a benign and a malignant tumor?
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Benign tumors do not metastasize; malignant tumors do
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Which of the following will help prevent cancer and increase survival?
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Seek early detection of tumors
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Homologous chromosomes...
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Carry genes controlling the same inherited characteristics
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What chromosomes belong to a normal human male?
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44 autosomes, one X chromosome, and one Y chromosome
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What chromosomes belong to a normal human female?
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44 autosomes, 2 X chromosomes
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Chromosomes that do not determine the sex of an individual are called...
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Autosomes
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Sexual intercourse in humans...
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Allows a haploid sperm cell to fertilize a haploid egg cell
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In meiosis, how does prophase I differ from prophase II?
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During prophase I there is one diploid cell; during prophase II there are two haploid cells
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How much genetic material is present in a cell during prophase I compared to a cell that has completed meiosis II?
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Four times as much
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During metaphase I...
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Homologous chromosomes line up in the middle of the cell
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Upon completion of telophase I and cytokinesis, there is (are)___cell(s).
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Two haploid
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Which of the following is a characteristic seen in prophase I that does not occur in prophase II?
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Crossing over occurs
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Anaphase II is essentially the same as mitotic anaphase except that in anaphase II____and in mitotic anaphase_____.
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The cells are haploid and sister chromatids separate...the cells are diploid and sister chromatids separate
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One difference between mitosis and meiosis is...
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Mitosis produces cells genetically identical to the parent cell, but meiosis does not
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Genetic variation is accomplished by all but one of the following. Which is it?
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The events of meiosis II
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Which of the following is the best description of the events of anaphase I?
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Homologous chromosomes randomly separate and migrate to opposite poles
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For a species with four pairs of chromosomes, ____chromosome combinations are possible.
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16
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A___ describes a site of crossing over.
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Chiasma
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Crossing over during prophase I results in...
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Genetic recombination
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A karyotype (a chromosome display) would be unable to determine____.
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Eye color
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How many chromosomes can a gamete possess as a result of nondisjunction?
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n + 1 or n-1
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How many chromosomes does an individual with Turner syndrome have?
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2n -1
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Nucleosomes are made of...
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DNA and histone proteins
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Plant cell cytokinesis differs from animal cell cytokinesis because
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Plant cells form a cell plate and animal cells do not
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Amanda's abnormal number of sex chromosomes resulted from
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Nondisjunction
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With respect to her sex chromosomes, Amanda would be designated as ___.
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XO
