PSYC-223 Chapter Notes - Chapter 2-3: Twin Study, Neural Tube, Infant Mortality
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Sickle cell disease: red blood cells which carry o2 are misshapen, meaning they cannot pass through the capillaries; they also (cid:271)lo(cid:272)k the paths of (cid:449)(cid:271)(cid:272)"s so the(cid:455) ha(cid:448)e lo(cid:449) i(cid:373)(cid:373)u(cid:374)odefe(cid:374)ses agai(cid:374)st i(cid:374)fe(cid:272)tio(cid:374) Gametes are sex chromosomes (23 chromosomes) while body cells are autosomes (46 chromosomes) Sex chromosomes determine gender (two large x= female, one x and one y=male); depends on sperm (all eggs are x) In vitro fertilization: sperm and egg are connected in a dish, then the fertilized egg is placed in the uterus (success is about. 30%; in addition often results in twins (low birth weights), and is expensive) (cid:862)fi(cid:448)e pare(cid:374)ts(cid:863): a (cid:271)a(cid:271)(cid:455) (cid:272)ould ha(cid:448)e fi(cid:448)e pote(cid:374)tial pare(cid:374)ts: a do(cid:374)or egg, do(cid:374)or sper(cid:373), surrogate (cid:373)other, and two adoptive parents. Each chromosome has 1molecule of dna, gene: a group of nucleotide bases that code for specific instructions. The larger chromosomes (ie #1 and 2 carry more genes than smaller ones ie y chromosome) (we are 99% alike)
