Mitosis vs meiosis
Quick answer: Mitosis preserves chromosome number for growth; meiosis reduces ploidy and increases variation for sexual reproduction.
Both use spindles and condensed chromosomes, but their goals and homolog behavior differ.
Use the table rows first for rapid contrast, then read the similarity and difference sections to lock in exam-ready language. Finish with the “when to use which term” guidance before attempting the self-checks.
Diagram
Homologous chromosomes separate. Crossing over can occur in prophase I.
Sister chromatids separate, producing haploid products.
Side-by-side comparison
| Feature | Mitosis | Meiosis |
|---|---|---|
| Purpose | Growth/repair; identical nuclei | Gametes; genetic diversity |
| Divisions | One nuclear division | Two divisions |
| Products (typical) | Two diploid daughters | Four haploid products |
| Homologs | Do not pair as bivalents | Pair and segregate in meiosis I |
| What separates first | Sister chromatids | Homologs in meiosis I; sisters in II |
| Variation | Aims for continuity | Crossing over + assortment |
| Chromosome number | Maintained | Halved |
Similarities
Both segregate chromosomes using cytoskeletal machinery.
Both require prior DNA replication in standard teaching sequences.
Differences
Meiosis has homolog pairing and reduction.
Mitosis does not create haploid gametes.
When each term applies
Use mitosis for somatic division.
Use meiosis for sexual life cycles.
Common confusion
“Meiosis is mitosis twice” erases meiosis I’s unique reductional logic.
Common questions
What is the difference between mitosis and meiosis?
Mitosis produces nuclei with the same chromosome number for growth and renewal. Meiosis reduces ploidy over two divisions and introduces variation through homolog recombination and independent assortment.
Which process reduces ploidy?
Meiosis.
What does mitosis separate in anaphase?
Sister chromatids.
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