BIL 160 Lecture Notes - Lecture 2: Musa Balbisiana, Musa Acuminata, Propagule
3 Aug 2018
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Document Summary
Forces that drive evolution: mutation, non-infinite population size, migration, non-random mating, natural selection. In animals, the zygote is the only true totipotent cell. In plants, both the zygote and meristem cells are totipotent: a pluripotent animal cell can develop into any type of adult cell, but cannot give rise to extra-embryonic membranes (amnion, chorion, allantois, which are found only in tetrapods) If a mutation causes reproductive isolation, other factors can contribute to further differentiation in the newly separated gene pools over time. If the mutation results in more trna being available for the protein being translated, it can speed up translation of that protein. Genetic drift: genetic change due to sampling error: the smaller the population, the smaller the gene pool, the smaller the gene pool, the lower the genetic diversity. Inbreeding greatly increases the likelihood of homozygosity at multiple loci.
