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Physiology of Male Reproductive System

Physiology of Male Reproductive System - gametes o meiosis...

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Physiology of Male Reproductive System - Spermatogenesis : sperm formation by meiosis in seminiferous tubules of testes o begins occurring during puberty & continues throughout life o normally ~ 400 million sperm produced each day Kevin Kelleher, MTC Biology 211 Study Notes Exam 4 7 o terms: diploid (2n): normal chromosome number in most body cells; 46 in humans, or 23 pairs of homologous chromosomes (paternal & maternal chromosome of same chromosome number) haploid (n): chromosome number in gametes ; each human gamete only contains 23 total chromosomes (only 1 of each homologous pair ) chromatid: one chromosome of a duplicated chromosome meiosis: forms gametes; reduces chromosome number from 2n to n in
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Unformatted text preview: gametes o meiosis I : reduction division (2n to n) synapsis : during prophase, homologous chromosomes pair & exchange genetic information tetrads or bivalents “cross over” at similar regions independent assortment : during metaphase, homologous chromosomes line up in pairs at metaphase plate; either maternal or paternal chromosome of each homologous pair can be on a given side of equator both events lead to genetic variation in gametes o meiosis II: equatorial division (chromatids distributed equally) mitotic-like division; duplicated chromosomes separated Page3...
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