BIOLOGY 152 Lecture Notes - Speciation, Mutation, Archaea
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Which of the following statements best explains the process of allopatric speciation?
Genetic differences accumulate between populations that are isolated by a geographic barrier, eventually leading to reproductive isolation. |
Genetic differences accumulate through recombination between populations that are interbreeding, eventually leading to reproductive isolation. |
Genetic differences accumulate in a population through selective mate choice, leading to two groups that breed independently, causing reproductive isolation. |
Two populations in the same geographical area accumulate genetic differences by random chance, eventually leading to reproductive isolation. |
Genetic changes within a population as the result of genetic drift influences traits involved with mate choice, eventually leading to reproductive isolation. What is the basic difference between allopatric and sympatric modes of speciation?
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1) Parents from two different species mate and produce a fertileoffspring with a polyploid chromosome number. This is called
allopolyploidy | |
allopatric speciation | |
triploidy | |
mutation selection | |
autopolyploidy |
2)A monophyletic group would be best described as:
a grouping of most, but not all, species descended from a commonancestor | |
a grouping of all species descended from a common ancestor,including that ancestor | |
a grouping of all species descended from a common ancestor,excluding that ancestor | |
a grouping of all species that share a similar set of traits,regardless of whether the traits are homologous or analogous |
3) Vicariance refers to:
a pattern of speciation whereby new species evolve reproductiveisolation in sympatry | |
a kind of speciation where a small group of colonists founds apopulation on an island habitat | |
a pattern of speciation in which a population is subdivided by ageographical barrier | |
a technique for constructing phylogenetic trees based onsynapomorphies |