Chap. 20 - Reproduction and development

Chap. 20 - Reproduction and development - Reproduction and...

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Reproduction and development
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Tissue will develop into male or female genitalia
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Need to recognize STD’s (in book)
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By 6-8 weeks, organs are formed, heart is beating, brain waves are detectable
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How much do you know… which of the following are genetic abnormalities, which are chromosomal abnormalities, and which are developmental abnormalities?
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Genetic? Chromosomal? Developmental? Down syndrome Cystic fibrosis Spina bifida No arms or legs Sickle cell anemia
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Let’s see how development works… Down’s syndrome - chromosomal Cystic fibrosis - genetic Spina bifida - developmental No arms or legs - developmental Sickle cell anemia - genetic
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Sequence of events Egg and sperm Zygote Blastula – hollow ball made of single layer of cells Gastrula – three cell layers form: endoderm, mesoderm, ectoderm Organs and tissues develop (8 weeks for humans)
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valuable than older stem cells? Totipotency
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This note was uploaded on 01/05/2010 for the course BIO 101 taught by Professor Anderson during the Fall '09 term at Point Loma.

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Chap. 20 - Reproduction and development - Reproduction and...

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