Chromosome Behavior and Karyotypes
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Questions and Answers

What is the result of chromatids being pulled apart during cell division?

  • Each cell will have double the number of chromosomes.
  • Each cell will have 23 chromosomes.
  • Each cell will have 46 chromosomes. (correct)
  • Each cell will have no chromosomes.
  • What is the total number of homologous pairs of chromosomes in human cells?

  • 23 pairs (correct)
  • 22 pairs
  • 24 pairs
  • 46 pairs
  • Why is it necessary to condense DNA before mitosis?

  • To ensure that DNA is more accessible for replication.
  • To allow for easier organization and distribution of chromosomes. (correct)
  • To prevent chromosomal damage during separation.
  • To enable the expression of genes during cell division.
  • Which statement accurately describes gametes?

    <p>They are involved in fertilization.</p> Signup and view all the answers

    In which scenario are karyotypes most useful?

    <p>When diagnosing genetic disorders.</p> Signup and view all the answers

    Study Notes

    Chromosome Behavior

    • Chromatids separate and each cell will have 46 chromosomes
    • A gene specific to stomach cells is turned off in the eye cells
    • A karyotype is an image of all chromosomes
    • Condensing DNA before mitosis is important because it will be a challenge without condensed packaging

    Homologous Pairs

    • Homologous pairs have the same size
    • Homologous pairs have the same genes
    • Humans have 23 pairs
    • Humans have 22 pairs of autosomes
    • 1 pair of sex chromosomes
    • Eye color is a trait controlled by a gene on an autosome

    Gametes

    • Gametes are sex cells.
    • Contain half the number of chromosomes as a body cell
    • Gametes contain 23 chromosomes
    • Fertilization of an egg and sperm results in a zygote
    • A zygote has 46 chromosomes
    • Haploid is 23
    • Diploid is 46

    Karyotypes

    • Karyotypes are most useful in diagnosing genetic disorders.

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    Description

    This quiz explores the behavior of chromosomes, including the separation of chromatids and the significance of homologous pairs. It also discusses the structure and diagnostic utility of karyotypes in identifying genetic disorders. Learn about gametes and their role in reproduction.

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