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The cells formed by meiotic division con...

The cells formed by meiotic division contain half the number of chromosomes and are identical to each other.

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To determine whether the statement "The cells formed by meiotic division contain half the number of chromosomes and are identical to each other" is true or false, we can analyze the process of meiosis step by step. ### Step-by-Step Solution: 1. **Understanding Meiosis**: Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four genetically diverse daughter cells. It consists of two main stages: Meiosis I and Meiosis II. 2. **Starting with a Diploid Cell**: In humans, the starting point for meiosis is a diploid cell (2n), which contains two sets of chromosomes (one from each parent). For example, if we denote the number of chromosomes as 2n, where n is the haploid number, the diploid cell has 2n chromosomes. 3. **Meiosis I**: During Meiosis I, the diploid cell undergoes division to produce two haploid cells. Each of these cells has n chromosomes, and the genetic material is still in duplicated form (sister chromatids). Therefore, after Meiosis I, we have two cells, each with n chromosomes (1n). 4. **Meiosis II**: In Meiosis II, the two haploid cells divide again, separating the sister chromatids. This results in a total of four haploid daughter cells, each with n chromosomes. 5. **Genetic Variation**: Importantly, during Prophase I of Meiosis I, a process called crossing over occurs. This is where homologous chromosomes exchange segments of genetic material, leading to genetic variation among the resulting daughter cells. As a result, the four daughter cells produced are not identical to each other; they each have different combinations of alleles. 6. **Conclusion**: The first part of the statement is true: the cells formed by meiotic division do contain half the number of chromosomes (haploid). However, the second part of the statement is false: the cells are not identical to each other due to genetic recombination that occurs during crossing over. ### Final Answer: The statement is **false** because, while the cells formed by meiotic division contain half the number of chromosomes, they are not identical to each other. ---
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Study the diagram given below which represents a stage during the mitotic cell division and answer the questions that follow: Which is the cell division that results in half the number of chromosomes in daughter cells?

A cell has 5 pairs of chromosomesą„¤ After mitotic division, the number of chromosomes in daughter cell will be

Knowledge Check

  • The number of chromosomes is reduced to half during

    A
    mitosis
    B
    meiosis iII
    C
    Meiosis involves pairing of non-homologous chromosomes and recombination between them.
    D
    fertilisation.
  • Meiotic division takes place in the cells of:

    A
    root tips
    B
    stem tips
    C
    pollen mother cells
    D
    leaf tips
  • The sperm of Drosophila contains ____ number of chromosomes:

    A
    4
    B
    46
    C
    23
    D
    8
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