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22 Cards in this Set
- Front
- Back
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A human cell contains ____ pair(s) of sex chromosomes.
a. 1 b. 2 c. 22 d. 23 |
a. 1
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Mitosis _____ chromosome number, while meiosis _____ the chromosome number of the daughter cells.
a. maintains, increases b. increases, maintains c. increases, decreases d. maintains, decreases |
d. maintains, decreases
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How many chromatids are in a cell as it enters meiosis?
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2 times the diploid number
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How many chromosomes are in each daughter cell following meiosis I?
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haploid number
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How many chromatids are in each daughter cell following meiosis I?
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2 times the haploid number
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How man chromosomes are in each daughter cell following meiosis II?
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haploid number
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The two major functions of meiosis are to
a. maintain chromosme number and create genetically unform products b. reduce chromosome number and create genetically uniform products c. reduce chromosome number and create gentically variable products d. maintain chromosome number and create genetically variable products |
c. reduce chromosome number and create genetically variable products
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a cleavage furrow forms, resulting in haploid nuclei. Each chromosome contains two chromatids
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telophase I
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tetrads form, and crossing-over occurs
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prophase I
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Dyads align at the spindle equator
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metaphase II
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four haploid daughter cells are created
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telophase II
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homologous chromosomes move to opposite poles
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anaphase I
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sister chromatids separate
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anaphase II
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tetrads align on the spindle equator
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metaphase I
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chromosomes in haploid nuclei condense
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prophase II
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the condition that results when an egg carrying 23 chromosomes unites with a sperm carrying 22 chromosomes is called
a. monosomy b. isomy c. trisomy d. tetrasomy |
a. monosomy
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an individual with Turner syndrome is conceived when a normal gamete unites with
a. an egg taht was produced by nondisjunction during oogenesis b. a sperm that was produced by nondisjunction during spermatogenesis c. either a or b is correct d. both a and b are correct |
c. either a or b is correct
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an individual with triple X karyotype (47, xxx) would have how many Barr bodies?
a. 0 b. 1 c. 2 d. 3 |
c. 2
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crossing-over
a. involves recombination between nonhomologous chromosomes b. involves recombination between sister chromatids c. occurs only between members of a tetrad d. occurs between adjacent tetrads |
c. occurs only between members of a tetrad
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the separation of sister chromatids of a dyad in anaphase II results in
a. dyads b. daughter chromosomes c. tetrads d. sister chromatids |
b. daughter chromosomes
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how many chromosomes are in a parent cell entering meiosis?
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diploid number
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which of the following best describes the attachment of chromosomes to the spindle apparatus during meiosis I?
a. the homologous pair lines up together, with homologues facing opposite spindle pole b. the homologous pair lines up together, with homologues facign the same spindle pole. c. homologous pairs do not line up together, but h omologues face opposite spindle poles d. homologous pairs do not line up together, with homologues facing the same spindle pole |
a. the homologous pair lines up together, with homologues facing opposite spindle pole
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