Meiosis

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What is meiosis?

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Meiosis is a type of cell division that reduces the chromosome number by half, producing four haploid cells from one diploid cell, essential for sexual reproduction.

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What is a haploid cell?

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A haploid cell contains half the usual number of chromosomes, represented as 'n'. In humans, haploid cells are sperm and egg cells.

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What is a diploid cell?

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A diploid cell contains two complete sets of chromosomes, one from each parent, represented as '2n'. In humans, body cells are diploid.

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How many chromosomes do humans have in their body cells?

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Humans have 46 chromosomes in their body cells, organized into 23 pairs.

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What is the purpose of meiosis in sexual reproduction?

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Meiosis produces sex cells (gametes) that combine during fertilization to form a new organism.

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What are homologous chromosomes?

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Homologous chromosomes are pairs of chromosomes, one from each parent, that have the same genes but may have different alleles.

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What happens during crossing over in meiosis?

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During crossing over, homologous chromosomes exchange genetic material, increasing genetic diversity in the offspring.

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What is the difference between mitosis and meiosis?

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Mitosis results in two identical diploid cells, while meiosis results in four genetically diverse haploid cells.

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Where does meiosis occur in the human body?

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Meiosis occurs in the testes (in males) and ovaries (in females) to produce sperm and egg cells.

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What is a gamete?

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A gamete is a haploid reproductive cell (sperm or egg) that can fuse with another gamete during fertilization.