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Meiosis vs Mitosis

Mitosis preserves chromosome number; meiosis halves it and shuffles via crossover and independent assortment.

A free, animated meiosis vs mitosis you can read here or embed on any website, from Scrollchart.

Meiosis vs Mitosis

Meiosis vs MitosisMitosis preserves chromosome number (2n → 2n); meiosis halves it (2n → n) with recombinationMITOSISMEIOSIS1 DivisionMeiosis I (homologue separation)Meiosis II (sister chromatid separation)

Side-by-side flow comparing mitosis (one division, two diploid daughters) with meiosis (two divisions, four haploid daughters with recombination).

Good for

  • Genetics and reproductive biology courses
  • Fertility and IVF patient education on chromosome errors
  • Evolution explainers covering sources of genetic variation

Source & accuracy

This meiosis vs mitosis is an editorial illustration built to represent the concept accurately. Where it shows figures, they are typical or representative values chosen to make the relationship clear, not a single underlying dataset. The diagram and its explainer are reviewed and maintained centrally, and updated over time as understanding improves.

One division versus two

Mitosis is a single division that produces two daughter cells genetically identical to the parent, each keeping the full chromosome number. It underlies growth, tissue maintenance, and repair throughout the body.

Meiosis is two consecutive divisions that start from one cell and yield four cells, each with half the chromosome number. It occurs only in the formation of gametes (eggs and sperm), so that fertilization restores the normal count.

Where the genetic shuffling happens

Meiosis generates variation in two ways absent from mitosis. During prophase I, paired homologous chromosomes exchange segments through crossover. Then independent assortment randomly distributes maternal and paternal chromosomes into the daughter cells.

A key structural difference is that homologous chromosomes pair up in meiosis I but never pair in mitosis. Errors in separating chromosomes during meiosis can produce gametes with the wrong number, which is the basis of conditions caused by an extra or missing chromosome.

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Reference

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