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Lecture 9

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
Created by: stacymdez