PSYC 100 Lecture Notes - Lecture 5: Quantitative Genetics, Twin Study, Twin
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PSYC 100 Full Course Notes
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Mating has a lot to do with genetics and evolution. (cid:862)it ru(cid:374)s i(cid:374) the fa(cid:373)ily(cid:863) a quick bio lessons: A human = dna, 23 chromosome pairs, recipe to make a human. Dna strand = gene (code for something specific about the human ex. Iq score = polygenic trait (multiple elements vary, so multiple genes included) 25 000 genes. Compare dna with random person you will find you share 99. 5% with them! Instead of alleles deciphering eye colour, maybe they can decide what behaviors you will inherent. (cid:862)ge(cid:374)ius s heritable(cid:863) one possibility. Or it could just be something kids learn in their environment growing up. (cid:862)(cid:374)ature (cid:448)s. (cid:374)urture(cid:863) (cid:862)(cid:374)ati(cid:448)is(cid:373) (cid:448)s. e(cid:373)piri(cid:272)is(cid:373)(cid:863) Dizygotic twins (share womb but diff zygotes)17% concordance rate. Mz twins, same dna, grew up in diff environments. 38% concordance rate. Genes that are successful, stay in the gene pool. Dodos went instinct because they had no one else to pass their genes on.
