4. Heredity Fertilization = sperm + ovum ( the gametes ) = one set of paired chromosomes = single new cell, a zygote.
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10. b B B b b b B B Mother B b Father B b b B Blond hair Brown hair How Brown-Haired Parents Can Have a Blond-Haired Child The gene for blond hair is recessive.
11. Some Genetic Disorders Down Syndrome Sickle-Cell Anemia Tay-Sachs Klinefelter’s Syndrome
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13. The Start of Life Alternate forms of fertilization (Reproductive Technology) Artificial Insemination
14. The Start of Life Alternate forms of fertilization (Reproductive Technology) In vitro fertilization (IVF) Eggs are harvested from the woman’s ovaries, fertilized in the lab, and then deposited in the uterus
15. The Start of Life Alternate forms of fertilization (Reproductive Technology) Gamete intrafallopian transfer
16. The Start of Life Alternate forms of fertilization (Reproductive Technology) Zygote intrafallopian transfer (~ IVF + GIFT)
17. Success Rates of Three Different Assisted Reproduction Techniques There is little variation in success rates based on couples’ ages. 0 10 20 30 40 29.2% 31% 24.5% ZIFT IVF GIFT
18. This single cell is transformed into a person by the human genetic code. Zygote
19. The Start of Life The Onset of Development Germinal Stage (first two weeks) Germinal disc 0.8 hours post fertilization
20. The Start of Life The Onset of Development Embryonic Stage (two to eight weeks)
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22. The Start of Life The Onset of Development Fetal Stage (eight weeks until birth) During the fetal period, the proportions of the body change dramatically.
