| Question |
Answer |
| Bottle neck |
an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing. |
| homologous structure |
similar structure that share a common evolutionary origin. ex the limbs of mamals |
| group selection |
this hypothesis stated that a certain gene for not reproducing was inheritied, thus controling polutaion size at an advantagous level |
| stabilizing slection |
maintains uniform charchter in a population by eliminating deviations from the norm. |
| gene flow |
migration of individuals b/w populations will result in a loss or gain of genes and thus change the compostion of the gene pool |
| directional selection |
produces an adaptave change over time with an increase in the proprtion of individuals with an extream phenotype. This occurs when organisms must adapt to a changing enviorment |
| genetic drift |
changes in the composition of the gene pool due to chance |
| asortive mating |
mates selectied according to critiereia such as phenotype and proximity |
| disruptive selection |
population genetics that simultaneously favor individuals at both extremes of the distribution. ex finch beak size |
| convergent evolution |
refers to the independant development of dissimilar charachteristics in two or more lineages NOT sharing common ancestry. ex fish dolphins |
| parallel evolution |
is the development of a similar trait in different not closely related species (that is in species of a different clade), but descending from the same ancestor |
| divergent evolution |
refers to the individual development of dissimilar charachteristics in two or more lineages sharing common ancestry |
Buen Viaje lv.2 ch 8
