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BILD3
Lecture 9
Term | Definition |
---|---|
sexual selection | A form of natural selection in which individuals with certain traits are more likely to obtain mates |
inter-sexual selection | competition for the attention of the opposite sex. (Think US interstate highway system) |
intra-sexual selection | competition among individuals of one sex (usually males) for mates |
biological species concept | group whose members have the potential to interbreed in nature and produce viable, fertile offspring |
morphological species concept | Species are defined by morphological traits alone |
phylogenetic species concept | Set of organisms that share a unique genetic history |
zygote | The cell formed by the union of a male sex cell (a sperm) and a female sex cell (an ovum) |
habitat isolation | mate in different places (e.g. land vs water) |
physical isolation | can’t get near each other b/c barrier |
behavioral isolation | different ways of recognizing mates |
temporal isolation | mate at different times of day or year |
mechanical isolation | incompatible mating parts |
gametic isolation | sperm and eggs aren’t compatible |
hybrid | the offspring resulting from combining the qualities of two organisms of different breeds, varieties, species or genera through sexual reproduction |