Cards (151)

  • What type of division is meiosis?
    Reduction division
  • What happens to the chromosome number during meiosis?
    It reduces from diploid (2n) to haploid (n)
  • What is the product of meiosis?
    A gamete
  • What restores the diploid number after meiosis?
    The fusion of gametes at fertilisation
  • How does meiosis affect chromosome number in sexually reproducing populations?
    It keeps the chromosome number constant across generations
  • How is the reduction of DNA content achieved in meiosis?
    Through two divisions of chromosomes
  • How many daughter cells are produced from one meiosis process?
    Four daughter cells
  • Why are the daughter cells genetically different in meiosis?
    Due to crossing over and random assortment
  • What is the significance of genetic variation in offspring?
    It increases survival chances in changing environments
  • What are the stages of meiosis?
    1. Meiosis I
    • Prophase I
    • Metaphase I
    • Anaphase I
    • Telophase I
    • Cytokinesis
    1. Meiosis II
    • Prophase II
    • Metaphase II
    • Anaphase II
    • Telophase II
    • Cytokinesis
  • What occurs during Prophase I of meiosis?
    Chromatin condenses, bivalents form, crossing over occurs
  • What is a bivalent in meiosis?
    A pair of homologous chromosomes
  • What happens at the chiasmata during meiosis?
    Crossing over occurs between homologous chromosomes
  • What is random assortment in meiosis?
    The random orientation of homologs at the equator
  • What happens during Anaphase I of meiosis?
    Spindle pulls chromosomes towards each pole
  • What is the ploidy of the nuclei at Telophase I?
    Haploid
  • What occurs during Cytokinesis of meiosis?
    Two new cells are formed, each haploid
  • What happens during Prophase II of meiosis?
    Chromosomes condense and spindle forms
  • What is the significance of random assortment in Metaphase II?
    It contributes to genetic diversity
  • What happens during Anaphase II of meiosis?
    Centromeres divide and chromatids are pulled apart
  • What is the outcome of Telophase II?
    Nuclear membranes reform around chromosomes
  • How does mitosis differ from meiosis in terms of divisions?
    Mitosis has one division, meiosis has two
  • What type of cells does mitosis produce?
    Two genetically identical cells
  • Why does meiosis produce genetically different cells?
    Due to crossing over and random assortment
  • In which type of cells does meiosis occur?
    In diploid cells
  • What happens to the diploid number during meiosis?
    It is reduced to the haploid number
  • Can mitosis occur in haploid cells?
    Yes, it can produce haploid cells
  • What do haploid cells produce when undergoing mitosis?
    Haploid cells
  • What do diploid cells produce when undergoing mitosis?
    Diploid cells
  • Compare mitosis and meiosis in terms of genetic outcomes.
    • Mitosis:
    • Produces two identical cells
    • One division
    • Meiosis:
    • Produces four genetically different cells
    • Two divisions
  • What is the main focus of the video discussed?
    Overview of meiosis stages
  • How does meiosis differ from mitosis?
    Meiosis creates haploid cells, mitosis creates diploid
  • What type of cells does meiosis produce?
    Haploid gametes
  • What is the purpose of meiosis?
    To create gametes with half genetic information
  • How many stages are there in meiosis?
    Two stages: meiosis I and meiosis II
  • What happens to chromosomes during meiosis?
    They copy and then split twice
  • What is the result of meiosis in terms of gametes?
    Four genetically different haploid gametes
  • What is the difference between homologous chromosomes and sister chromatids?
    Homologous chromosomes are from different parents
  • What is the first main stage of meiosis called?
    Meiosis I
  • What occurs during prophase I of meiosis?
    Chromosomes condense and crossing over occurs