What is the difference between mitosis and meiosis

Mitosis and meiosis are both forms of cell division, but they serve different biological roles. Mitosis copies a cell to maintain the same chromosome number, creating two daughter cells that are clones of the original. Meiosis reduces the chromosome number by half, creating four non‑identical gametes that can combine during fertilization.

Key Phases

The main phases of each process are:

• Mitosis: Prophase, Metaphase, Anaphase, Telophase (and cytokinesis)
• Meiosis I: Prophase I, Metaphase I, Anaphase I, Telophase I
• Meiosis II: Prophase II, Metaphase II, Anaphase II, Telophase II

A concrete example clarifies the chromosome count. A human somatic cell starts with a diploid set (2n = 46) chromosomes. During mitosis the DNA replicates once, sister chromatids separate, and each of the two daughter cells receives (46) chromosomes, preserving the diploid state. In meiosis the same (46) chromosomes duplicate once, but homologous pairs separate in Meiosis I and sister chromatids separate in Meiosis II, so each of the four gametes ends up with (n = 23) chromosomes, half the original number.

To trace one round of each division:

1. 1Begin with a diploid cell containing 46 chromosomes.
2. 2In mitosis, duplicated sister chromatids are pulled apart, producing two cells each with 46 chromosomes.
3. 3In meiosis, homologous chromosomes separate in Meiosis I, then sister chromatids separate in Meiosis II, yielding four cells each with 23 chromosomes.

Side‑by‑side comparison of outcomes:

Understanding these differences is crucial for genetics, developmental biology, and medicine. Mitosis maintains genetic stability across somatic cells, whereas meiosis creates the diversity essential for evolution. Remember the chromosome count, number of divisions, and the presence of genetic recombination to distinguish the two processes clearly.