EEB 2202 Lecture Notes - Lecture 11: Ancient Dna, Genetic Drift, Coevolution
11 Apr 2017
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Maternal effects: isolating genetic and environmental effects. Cross-fostering - date from in vitro fertilization when eggs and embryo are borne by surrogate mother, prenatal and genetic effects can be separated. Phenotype of offspring can be affected by the environment of the mother. Nutrition- a calorie poor diet, or deficiencies in particular requirements can have long term effects on offspring. Differences in nutrition affect body weights of both mother and offspring these similarities might be misinterpret as genetic effects: because environmental effects can look like a genetic component we distinguish two different estimates of heritability: Narrow sense more desirable, better estimate of additive genetic effects: disentangling effects of genes and environment. Suggests rearing environment differ more than the environment of twins reared together who share a common household. Iq debate: iq is a score calculated from the results of any one of the variety of tests. Intelligence exists and is accurately measurable across racial, language, and national boundaries.
