PSYCH 2AA3 Lecture Notes - Lecture 5: Prenatal Development, Gamete, Chromosome
2 Jun 2020
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Only 1% of genes cause individual differences among people: phenotype: individuals physical, behavioral, and psychological features. Having a sickle cell allele (heterozygous sickle cell trait) makes you more resistant to malaria. And is adaptive in places where malaria is prominent: adaptive in areas such as the caribbean, central and south america, and. Africa allele continues to be passed on: not adaptive in areas such as canada - malaria cases are close to none. In successive generations, we should expect lower levels of sickle cell anemia and sickle cell trait in canada. Huntington"s disease: majority of illnesses are a result of recessive phenotypes, note huntington"s disease is a rare dominant phenotype symptom onset occurs in the 40s after one has children. 20, likelihood at age 40 is 1/50: characteristics: almond shaped eyes with a fold over eyelid, head/neck and nose is usually smaller than average, life expectancy is age 50.
