7.4 population genetics - part 2
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10 Terms
what are the non-random occurences?
natural selection, artifical selection, mutations caused by environmental factors
what is natural selection?
certain traits become more/less common based on fitness dis/advantages
What happens to traits with a fitness advantage?
more likely to survive, passed to offspring
what happens to traits with a fitness disadvantage?
less likely to survive, reduced over time
what is artifical selection?
selectively breeding plants/animals with desired traits, making new breeds
how does artifical selection influence genetic makeup?
selecting advantages with desired traits to reproduce
What is the other way mutations can becaused
exposure to environmental factors - radiation, chemicals
how are mutations random?
random in terms of occurence in population
how are mutations not random?
are caused by a specific environmental trigger
how are nonrandom mutations different from random mutations?
involve selection pressure/human inervention - leads to predictable changes
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