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humansex
Course: BIO 110, Fall 2009School: Cal Poly Pomona
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Word Count: 286
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is Reproduction one of the Properties of Life Asexual Reproduction Offspring genetically identical to single parent Binary fission Budding/ Fragmentation/ Cloning How is asexual reproduction accomplished? MITOSIS Duplicate chromosomes Equally divide chromosomes 2 genetically identical daughter cells Figure 8.8 Humans Reproduce by Sexual Reproduction Gametes Fertilization 1 cell...
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is Reproduction one of the Properties of Life
Asexual Reproduction
Offspring genetically identical to single parent Binary fission
Budding/
Fragmentation/ Cloning
How is asexual reproduction accomplished?
MITOSIS
Duplicate chromosomes Equally divide chromosomes
2 genetically identical daughter cells
Figure 8.8
Humans Reproduce by Sexual Reproduction
Gametes Fertilization 1 cell Zygote Growth & Development
Egg Sperm
Embryo: 1st trimester Fetus: 2nd and 3rd trimester
Figure 8.14
Only in gonads
ovaries testes
Figure 8.17
Figure 8.3
Barley 14 Corn 20
Tobacco 48
Horsetails 216
Meiosis in Humans produces gametes
Egg
Sperm
Figure 26.00a
Union of Sperm and Egg make a ZYGOTE (fertilization)
We all started life as a single cell ZYGOTE.
Human Gametes
Male SPERM 250,000,000 500,000,000 per ejaculation 10,000 sperm made every second 72 days to mature
Female EGGS 1 egg released each 28 day ovarian cycle All egg follicles produced before female is born +1 million egg follicles before birth 40,000400,000 by puberty 450 maximum needed
Figure 26.00b
Ovulation
Ejaculation
Fertilization
Zona pellucida Zygote Mitosis Mitosis Mitosis
Blastocyst
Cells divide my M I TOSI S to produce two daughter cells with the number same of chromosomes as the original cell.
Extra Photo 26.16x01
Human Chorionic Gonadotropic Hormone
HCG
Produced by blastocyst Keeps ovary producing estrogen & progesterone to maintain uterus lining
Ovary
Depresses mother's immune system; allows implantation
Figure 26.6a
Figure 26.4b
Took 15 minutes
http://www.youtube.com/watch?v=9MnQxiSJZ4Q&eurl=http://technorati.com/videos/youtube.com%2Fwatch%3Fv%3D9MnQxiSJZ4Q
Before
20 weeks
40 weeks
Vernix caseosa
196 days
Three Stages of Childbirth
Figure 26.22a
Figure 26.22b
Figure 26.22c
Figure 26.1
Squeamish Level = 9
Cesarean Section Delivery
Figure 26.9
F...
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