BIO220H1 Lecture Notes - Lecture 15: Inbreeding Depression, Extinction Vortex, Nucleotide Diversity
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BIO220H1 Full Course Notes
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The loss of biodiversity is the most important process of environmental change. This is because it is the only process that is wholly irreversible. Its consequences are also the least predictable, because the value of the earth"s biota is largely unstudied and unappreciated e. o wilson. Biodiversity: the number of kinds of living organisms in a given area, multiple hierarchical elements. Interspecific variation or species diversity" is variation between species (ecologists study) Intraspecific variation or genetic diversity" is variation within an individual species (evolutionary geneticists: partitioning genetic diversity. Conservation genetics: applying genetic methods to conservation, restoration and. Chance changes in gene frequency increase in size. Loss of genetic variation as alleles fix randomly (and will move to 100% frequency by chance alone) Inbreeding depression from exposure of rare, recessive alleles (increase of homozygosity, thus more exposure of recessive alleles) Loss of heterozygote advantage for fitness: demographic effects of declining populations.
