Genetic Change Over Time Chap 16 Flashcards Preview

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Flashcards in Genetic Change Over Time Chap 16 Deck (16):
1

On what 2 things does evolution depend?

Natural Variation and Natural Selection

2

These traits are controlled by only one gene.

Single Gene Trait

3

This is the sum total of all the genetic information of a population.

Gene Pool

4

What kind of a trait is tongue rolling?

Single Gene Trait

5

This is the comparison of how often alleles occur in a certain population.

Relative Frequencey

6

Height, is controlled by many genes and produces a RANGE of phenotypes. What kind of a trait is it?

Polygenic Trait

7

What are two sources of natural variation?

Mutations and Gene Shuffling

8

Which provides a greater source of heritable differences, mutations or gene shuffling?

Gene Shuffling

9

In a gene pool there are 10 dominant alleles and 40 recessive alleles. What is the relative frequencies of each allele?

10/50 = 20% for dominant allele

40/50 = 80% for recessive allele

10

What is the name for a change in the relative frequencies of alleles in a population called?

Evolution

11

What was the name of Darwin's ship?

H.M.S. Beagle

11

This is the ability of an organism to survive and reproduce in its environment based upon its characteristics.

Fitness

12

Sexual reproduction can produce many phenotypes but it cannot do this.

Change the relative frequency of alleles in a population.

13

The number of phenotypes produced for a given trait depends on . . . .

how many genes control that trait.

14

What is the name of the process where those organisms that have the greatest fitness are better able to survive, reproduce and pass on their genes?

Natural Selection

15

This is any physical or behavior characteristic that increases an organisms chance for survival.

Adaptation