ANTH 105 Lecture Notes - Lecture 6: Evolutionary Developmental Biology, Devo, Ernst Haeckel
9 Sep 2016
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A gene will be dominant if one of the alleles masks the effects of the other allele. A gene will be recessive if its expression is masked by the other allele. May be thought that each gene has a single biological effect while true in cases, actually more complex. When 1 phenotypic expression results from interaction of multiple genes. Modern study on how genes have influenced embryological development. How and why body has different limbs and organs. Why specific body parts go where they do. How development is tweaked over time leading to different species. Embryos pass through stages equivalent to adult forms of ancestors. Embryos pass through stages in which they look like ancestors and related species. Genes that act to turn other genes on and off. Group of related organisms that can interbreed and produce fertile viable offspring. Thus a species can be considered as a closed system.
