Meiosis

Meiosis is the τ-categorical Sex-as-Second-Distinction morphism: a two-round reductional+equational division (meiosis I + meiosis II) that introduces a secondary self/other-self distinction within the self-class and produces four haploid carriers whose pairwise fusion (fertilisation) re-enters the diploid carrier class. It is the categorical mechanism behind sexual reproduction (VI.T26).

Categorical invariant. Meiosis = τ-Distinction refinement: the original D self/non-self distinction is internally subdivided D ↦ (D, D'), then re-fused via syngamy — generating new carriers via the recombination functor (VI.D49).

Primary registry anchor: VI.T26

Supporting items: VI.D04, VI.D49, VI.T12, VI.T11

1. I.K0 — Universe Postulate
2. VI.D15 — Life Sector
3. VI.D04 — τ-Distinction — base self/non-self predicate
4. VI.D49 — Recombination Functor — the categorical mixing operator
5. VI.T26 — Sex as Second Distinction — meiosis is its instantiation

Biomarker: Synaptonemal-complex protein (SYCP1/3) immunostaining in pachytene; chiasma frequency per bivalent (~1-3 in human); sex-specific recombination map distance (cM); MLH1 foci as crossover markers.

Measurable range: Human chiasma frequency ~50 per cell (autosomes); recombination rate ~1 cM·Mb⁻¹ on average, sex-biased (female ~1.6× male in humans); meiosis I prophase duration ~weeks (mouse spermatocyte) to decades (human oocyte arrest at dictyate).

Observation method: Pachytene chromosome spreads with SYCP3/MLH1 immunostaining; whole-genome sequencing of single sperm/oocytes for direct recombination measurement; PRDM9 hotspot mapping; FISH karyotyping of meiotic products.

Calibration anchor: LG-Y02-kinetic-pseudoscalar-channel

Anchor chain:

1. VI.L18 chirality channel
2. B-form DNA chirality preserved through homologous pairing and crossover
3. L-amino-acid stereochemistry of SPO11 and the synaptonemal complex

Manuscript reference: manuscript-sources/book-06/part06/ch36-sexual-reproduction.tex

Status: Planned

Related glossary entries

• LG-P06-cellular-replication Cellular Replication
• LG-P07-mitosis Mitosis
• LG-Y02-kinetic-pseudoscalar-channel Kinetic Pseudoscalar Channel

Referenced by

• LG-P07-mitosis Mitosis
• LG-P11-speciation Speciation