BIO120H1 Lecture Notes - Lecture 20: Zygosity, Divergent Evolution, Adaptive Radiation
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BIO120H1 Full Course Notes
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I look at the term species, as a set of individuals closely resembling each other . Understanding origin of isolative reproduction will allow us to understand species . What ecological and genetic conditions are required for speciation to occur. The species problem involves the problem of how best to define a species. Taxonomic, biological, phenetic, recognition, genetic, cohesion, ecological, Can only be used on species that have sex. Concepts vary among different groups of organisms no universal species. A group of interbreeding natural populations that are reproductively isolated from concept. Allopatric (grow apart) often known as the theory of geographic speciation since geographical isolation is involved. Populations will diverge, where there will be fixed alternative alleles, and there will be two different extremes. Divergence is due to differential adaptation in environments. Gene flow doesn"t stop the divergence gene flow acts as a cohesive force. If you"re in different habitats, then the adaptations for each specific habitat are reproductive isolative genes.
