BIOL-K - Biology BIOL-K 103 Lecture Notes - Lecture 4: Chromosome, Ploidy, Ocean Sunfish
25 Apr 2017
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Document Summary
Adaptive radiation evolution of several species from one or a few ancestral species; occurs in relatively short time frame. Allopatric speciation formation of two new species following the physical separation of individuals of a growth of different body parts at different rates single population. Hybrid inviability evolution occurs as a result of slow steady changes over time egg and sperm of two different species are genetically incapable of producing a viable zygote and embryo. Hybrid sterility gametes of interspecies hybrid are not normal and able to produce a zygote. Hybrid breakdown the hybrid is unable to reproduce successfully; f1 and and f2 generations may be. Hybrid zone an area of overlap between closely related species or subspecies in which interbreeding produced occurs. Macroevolution large-scale changes over long time periods resulting in phenotypic changes that warrant placement of the organism into a new taxonomic group at or above the species level.
