Lecture 13 Flashcards Preview

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Flashcards in Lecture 13 Deck (20):
1

Define Homology

Similarity due to common descent

2

Genetic Homology

Similar genes

3

Structural Homology

Similar in structure

4

Development Homology

In Embyro stage we all look similar

5

Define Acclimate

You temporarily change to adjust to the environment and then revert back to original

6

Name the 4 Evolutionary Processes

1. Natural Selection
2. Mutation
3. Genetic Drift
4. Migration (gene flow)

7

Define Gene Pool

All the genes and alleles in a population; all the genetic information in a population

8

Directional Selection

Favors one extreme phenotypes causing average to shift left or right

9

Disruptive Selection

Favors the extremes phenotypes at both ends of range

10

Stabilizing Selection

Favors phenotypes near the middle of range

11

Define Intersexual

Mate choice; Show off to attract mate

12

Define Intrasexual

Male-Male competition for access to females

13

Sexual Dimorphism

Any trait that differs between males and females

14

Primary sexual trait

Sex organs for reproduction

15

Secondary sexual trait

The decorative features of male that will attract females
i.e. horns, antlers, behavior

16

Predictions of sexual Selection

1. Females should be choosy; male are willing to mate with any female

17

Prediction of sexual Selection

2. If there is an equal number of males and females in a population then males compete with other males for sex

18

Prediction of sexual Selection

If male fitness is limited by mating success then any allele increases attractiveness or success in male-male competition should increase the population

19

Natural Selection favors traits that enable an individual to _________…

Survive

20

Sexual Selection favors traits that enable an individual to __________…

Mate