NATS 1610 Lecture Notes - Seminiferous Tubule, Spermatocyte, Spermatozoon

• School: York University
• Department: Natural Science
• Course: NATS 1610
• Professor: Barbara Czaban

Document Summary

Oogenesis egg cells (oocytes: fertilization = union of egg + sperm produces fertilized egg (zygote) with dna from both parents, zygote cleaves to produce multicelled embryo. Each cell inherits the zygote"s dna: resulting offspring has traits inherited from both parents. Spermatogonium (diploid) male reproductive cell: meiosis i, cytoplasmic division. Primary spermatocyte (diploid: meiosis ii, cytoplasmic division. Chromosomes in each cell: 46 (diploid number; single strands) One daughter cell remains at the outer edge of the seminiferous tubule to maintain the germ cell line. One daughter cell moves toward the lumen to produce spermatozoa: meiosis. Chromosomes in each cell: 46 (diploid number; double strands) Chromosomes in each cell: 23 (haploid number; double strands) Secondary spermatocytes second meiotic division: packaging. Chromosomes in each cell: 23 (haploid number; single strands) Chromosomes in each cell: 23 (haploid number; single strands) spermatozoa. Oogonia (diploid) female reproductive cell: meiosis i, cytoplasmic division. Primary oocyte (diploid: meiosis ii, cytoplasmic division.