BIOL 241 Lecture Notes - Lecture 38: Meiosis, Allopatric Speciation, Polyploid
3 Apr 2016
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Theme 4c: the ways of change (drift, selection, and speciation) part ii. Speciation is the process by which new species arise, i. e. , Process is one of the most fundamental quesions in evoluionary biology today combines the study of ecology, evoluion & geneics links micro & macroevoluionary processes time. What happens if you put them back together. Host shifts and sympatric speciation habitat, temporal, behavioral isolation. Rana pipiens (leopard frog) and r. sylvaica (wood frog) Embryonic development of hybrids fails in early development (can lead to assorted maing) double check. With renewed or coninued contact between two populaions, there are three possible outcomes: What insigates the iniial stages of divergence (allo-means diferent country) Any factor that can separate parts of a species" distribuion for long periods. Course of sympatric speciation iniial stage: polymorphism that afects itness (e. g. , two forms adapted to eat diferent foods) Maings between two forms are discouraged (prezygoic) and/or disadvantageous (postzygoic)
