The Reproductive System: Part A - Next2Eden

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MEIOSIS IIProphase IIMetaphase IIMeiosis II begins with theproducts of meiosis I (2haploid daughter cells) andundergoes a mitosis-likenuclear division processreferred to as the equationaldivision of meiosis.Anaphase IITelophase IIand cytokinesisProducts ofmeiosis:haploiddaughter cellsAfter progressing through thephases of meiosis andcytokinesis, the product is 4haploid cells, each geneticallydifferent from the originalmother cell. (During humanspermatogenesis, the daughtercells remain interconnected bycytoplasmic extensions duringthe meiotic phases.)Copyright © 2010 Pearson Education, Inc. Figure 27.6 (2 of 2)
Mother cell(before chromosome replication)MITOSISChromosomereplication2n = 4ChromosomereplicationMEIOSISProphaseReplicatedchromosomeProphase ITetrad formed bysynapsis of replicatedhomologouschromosomesMetaphaseDaughtercells ofmitosisChromosomesalign at themetaphase plateSister chromatidsseparate duringanaphaseMetaphase IHomologous chromosomesseparate but sisterchromatids remain togetherduring anaphase IDaughter cellsof meiosis ITetrads align at themetaphase plate2n2nMeiosis IINo further chromosomalreplication; sister chromatidsseparate duringanaphase IIn n nDaughter cells of meiosis IIn(usually gametes)Copyright © 2010 Pearson Education, Inc. Figure 27.5 (1 of 2)
Page 1 and 2: PowerPoint ® Lecture Slidesprepare
Page 3 and 4: Reproductive System• Sex hormones
Page 6 and 7: PeritoneumSeminalvesicleAmpulla ofd
Page 8 and 9: The Scrotum• Temperature is kept
Page 10 and 11: The Testes• Sperm are conveyed th
Page 12 and 13: Blood vesselsand nervesSpermatic co
Page 14: Seminiferoustubule(c)Interstitial c
Page 17 and 18: The Penis• External anatomy inclu
Page 19 and 20: The Male Duct System• Epididymis
Page 21 and 22: Blood vesselsand nervesSpermatic co
Page 24 and 25: UreterAmpulla of ductus deferensUri
Page 26 and 27: Accessory Glands: Prostate• Encir
Page 28 and 29: UreterAmpulla of ductus deferensUri
Page 30 and 31: Semen• Alkalinity neutralizes the
Page 32 and 33: Male Sexual Response• Erection:
Page 34 and 35: Copyright © 2010 Pearson Education
Page 36 and 37: Meiosis• Gamete formation involve
Page 40 and 41: Number ofdivisionsSynapsis ofhomolo
Page 42 and 43: Copyright © 2010 Pearson Education
Page 44 and 45: Mitosis of Spermatogonia• Begins
Page 46 and 47: Meiosis: Spermatocytes to Spermatid
Page 48 and 49: Spermiogenesis: Spermatids to Sperm
Page 50 and 51: Approximately 24 daysGolgiapparatus
Page 52 and 53: Role of Sustentacular Cells• Tigh
Page 54 and 55: Role of Sustentacular Cells• Tigh
Page 56 and 57: HPG Axis1. Hypothalamus releases go
Page 58 and 59: 1Anteriorpituitary82GnRHVia portalb
Page 60 and 61: Mechanism and Effects of Testostero

The Reproductive System: Part A - Next2Eden

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