Lecture 3 posted - 2. Bigger sample size: The Pounder FYI:...

Info iconThis preview shows pages 1–31. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 311D LECTURE 3 Microevolution
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
Hardy-Weinberg p2 + 2pq + q2 = 1 p2 + 2pq + q2 = 1
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Hardy-Weinberg Find: Frequencies of the alleles A and a. The genotypic frequencies of AA, Aa and aa.
Background image of page 4
The Hardy-Weinberg equation
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Assumptions of the Hardy-Weinberg theorem Random mating No natural selection No migration (population is isolated) No mutations Very large population size (no genetic drift)
Background image of page 6
So what’s the point of it? (The Hardy-Weinberg theorem)
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Genetic variation changes in a population Gene flow Genetic drift Natural selection
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Genetic Drift ® candies: Phenotype Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Blue 5 1 7 0 13 Non-blue 48 52 47 53 40 Frequency (blue) 9% 2% 13% 0% 25%
Background image of page 10
Why are there differences in the frequency of 1. 2. Tests:
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Phenotype Sample 1 Sample 2 Sample 3 Sample 4 Sample 5 Blue 45 51 57 43 54 Non-blue 452 448 445 459 450 Frequency (blue) 10% 10% 11% 9% 11% 1. Call/email factory ( http://global.mms.com/us/ ) Frequency of blue = 10%
Background image of page 12
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 16
Background image of page 17

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 18
Background image of page 19

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 20
Background image of page 21

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 22
Background image of page 23

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 24
Background image of page 25

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 26
Background image of page 27

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 28
Background image of page 29

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 30
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 2. Bigger sample size: The Pounder FYI: M&M color make-up Brown 13% 30% Yellow 14% 20% Red 13% 20% Orange 20% 10% Blue 24% 10% Green 16% 10% Genetic drift: special cases Founder effect Bottleneck effect Examples of bottlenecks Founder effect Natural Selection Fitness Relative fitness Stabilizing selection Directional selection Disruptive selection Selection varies in space A favored A favored A favored a favored a favored a favored Selection varies in time A favored a favored a favored A favored wet dry dry wet Balanced polymorphisms Heterozygote advantage 10-20% 5-10% 1-5% Sickle Cell Disease Genotypes Relative fitness Hb-N Hb-N 0.85 Hb-N Hb-S 1.0 Hb-S Hb-S 0.0 Frequency-dependent selection Sexual selection Sexual dimorphism Intrasexual selection Intersexual selection Natural selection is a cause of adaptive evolution...
View Full Document

Page1 / 31

Lecture 3 posted - 2. Bigger sample size: The Pounder FYI:...

This preview shows document pages 1 - 31. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online