Psychology 2040A/B Lecture Notes - Lecture 3: Chorionic Villus Sampling, Pethidine, Color Blindness

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Psych 2040 week 3 - making healthy babies. Imprint of placenta a pretty big organ for expecting moms to grow in the first trimester: takes a lot of energy to grow and is why many women may experience fatigue in the first trimester. O(cid:374)e rod of ea(cid:272)h pair is fro(cid:373) (cid:373)o(cid:373), other is from dad. Dna: gene a segment of dna along the length of a chromosome, mitosis when dna duplicates itself. Allows a single cell formed at conception to develop into a baby. Each chromosome copies itself for the new cells. Meiosis: gametes sex cells, the sperm and ovum, contains only 23 chromosomes total (1/2 as many as other cells male and female, then come together to make complete cell with. 46 chromosomes: meiosis cell division process which halves the number of chromosomes normally present in cells, crossing over a stage in meiosis in which chromosomes next to each other break apart and exchange segments.

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