Unit 18 Natural Selections & Genetic Drift

Question 1

There are 3 causes of variety, which are:
1.
2.
3.

Answer 1

Independent assortment
Mutation
Crossing over during meiosis or from mutations

Question 2

Natural selection is the process of which organisms that has beneficial traits to their environment will survive than organisms that has unadvantage traits to suit in their environment. The example of this is is 2 different frog colors on the woods. The frog that has dark green color will most likely __________ than the light green frog color. This is because the _________ have higher chance to consume the lighter, which is easier to see the ________ frogs. The darker green frogs may have more _________ than the lighter frogs.In the biological sense, FITNESS is determined by NOT how ______ they are or how ______ they live, BUT by ___ ________ ____________ they have. The darker green frog pass down their _______ to their offspring. Over time, the population of darker green frogs will ____________ than the light green frogs

Answer 2

survive
predator
light green
FITNESS
strong
long
how many
DNA
increase

Question 3

Both natural selection and genetic drift are mechanism of _________. In natural selection, organisms that has beneficial _________and result in high ___________ __________ tend to be more frequent in a population over time. But, with genetic drift, the organisms that survive and have offspring were __________ selected. It’s not they are biologically fit - instead it’s more the organisms ______ the game of chance from an ________

Answer 3

evolution, traits, reproductive fitness, randomly, won, event

Question 4

What are 2 examples of genetic drift?

Answer 4

Founder effect
Bottleneck effect