Chapter 19: Natural Selection Flashcards

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1
Q

How does genetic variation in living organisms come about?

A

Crossing over of independent assortment of chromosomes during meiosis
OR
Mutation in genetic material

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2
Q

Why is genetic variation important?

A

Helps organisms survive and adapt in changing environments

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3
Q

What is natural selection?

A

The process that ensures the best adapted organisms within a population survive to reproduce and pass on their genes to the next generation

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4
Q

What is the difference between natural and artificial selection?

A

Natural selection:
Results from mutations in genes
Brought about by changes in environmental conditions
Slow process
May be both advantagous and disadvantagous to humans

Artificial selection:
Results from human manipulation
Human-selected organisms reproduce to give desired traits to offspring
Relatively faster process
Advantagous to humans

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