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Exam #3 W 12/5 at 7-8:30pm 9am class in ETC 2.108 and noon class in ECJ 1.202 Review T 12/4 at 5pm in WRW 102 Homework #4 due now. Evolution: A species’ genetic component changes as the individuals reproduce. These changes are based on how the DNA changes and who reproduces.

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slide1

Exam #3 W 12/5 at 7-8:30pm9am classin ETC 2.108andnoon class in ECJ 1.202

  • Review T 12/4 at 5pm in WRW 102
  • Homework #4 due now
slide2

Evolution: A species’ genetic component changes as the individuals reproduce. These changes are based on how the DNA changes and who reproduces.

slide6

DNA is passed from generation to generation, and therefore can tell us about relationships between individuals.

slide9

X 23

in humans

X 23

in humans

X 23

in humans

Each of us are a combination of DNA from mom and dad.

slide10

Mom provides 50.000275%andDad provides 49.999825% of DNA to offspring.

… because Mom provides 100% of mitochondrial DNA

slide14

By determining the average time between mutations, we can estimate the time of the last common ancestor.

Fig 4

slide15

The mutation rate in human mtDNA is one nucleotide change per 20,000 years.

OR

A difference of one nucleotide between two people indicates a common relative 10,000 years ago.

Fig 4

slide17

Two hypotheses about the origin of H. sapiens

Multiregional hypothesis

“Out of Africa” hypothesis

slide18

Relationships of different populations using mtDNA

~150,000ya

7 Daughters of Eve, fig. 1

slide19

Two hypotheses about the origin of H. sapiens

Multiregional hypothesis

“Out of Africa” hypothesis

slide23

Relationships of different people using mtDNA.

  • From Science v298 12/20/02 pg 2381
  • 93-95% of genetic variation within population.
  • 3-5% of genetic variation occurs between populations.

7 Daughters of Eve, fig. 2

slide27

Two hypotheses about the origin of H. sapiens

Multiregional hypothesis: disproved by mtDNA data

“Out of Africa” hypothesis: disproved by other DNA data

slide28

Relationships of different people using mtDNA.

  • From Science v298 12/20/02 pg 2381
  • 93-95% of genetic variation within population.
  • 3-5% of genetic variation occurs between populations.

7 Daughters of Eve, fig. 2

slide30

The nervous system allows us to perceive the environment while the brain integrates the incoming signals to determine an appropriate response.

slide32

Active seeking of infoversusSubconscious scanning for threats

Are we evolutionarily adapted to detect certain threats?

slide33

Emotion Drives Attention: Detecting the Snake in the Grass

Journal of Experimental Psychology: General

2001, Vol. 130, No. 3, 466-478

Arne Ohman, Anders Flykt,

and Francisco Esteves

http://sas.epnet.com/citation.asp?tb=0&_ug=sid+B751259C%2D3010%2D40FD%2D856F%2D2A9AA70CE5D2%40sessionmgr6+FE52&_us=SLsrc+ext+30AB&_usmtl=ftv+True+137E&_uso=hd+False+db%5B0+%2Dpdh+33B8&bk=S&EBSCOContent=ZWJjY8bb43ePqLhrvNfxa6Gmr4GPp7iFpKq5gKiWxpjDpfKDo6%2BwfqevrbjQ3%2B151N7uvuMA&rn=&fn=&db=pdh&an=xge1303466&sm=&cf=1

slide34

Ability to detect snake or spider versus flower or mushroomby grid

position

Fig 1. Emotion Drives Attention: Detecting the Snake in the Grass (2001) J. of Ex. Psy., Vol. 130, No. 3, 466-478

slide38

Ability to detect snake or spider versus flower or mushroomby grid

position

Fig 1. Emotion Drives Attention: Detecting the Snake in the Grass (2001) J. of Ex. Psy., Vol. 130, No. 3, 466-478

slide39

Ability to detect snake or spider versus flower or mushroom is relatively quicker in a larger grid

Fig 2. Emotion Drives Attention: Detecting the Snake in the Grass (2001) J. of Ex. Psy., Vol. 130, No. 3, 466-478

slide40

The Role of Social Groups in the Persistence of Learned Fear (2005) SCIENCE 309 pg 785 Andreas Olsson, Jeffrey P. Ebert, Mahzarin R. Banaji, Elizabeth A. Phelpshttp://www.sciencemag.org/cgi/content/full/309/5735/785

This perspective accompanies the article and has some useful background and further discussion:http://www.sciencemag.org/cgi/content/full/309/5735/711

slide41

Conditioned fear:

snakes/spiders

Fig 1. The Role of Social Groups in the Persistence of Learned Fear (2005) SCIENCE 309 pg 785

slide42

Conditioned fear:

race

Fig 1. The Role of Social Groups in the Persistence of Learned Fear (2005) SCIENCE 309 pg 785

slide43

Conditioned fear:

snakes/spiders

race

Fig 1. The Role of Social Groups in the Persistence of Learned Fear (2005) SCIENCE 309 pg 785

slide44

Fear of other races:

Whites

Blacks

Fig 2. The Role of Social Groups in the Persistence of Learned Fear (2005) SCIENCE 309 pg 785

slide45

Is Race Necessarily a Defining Characteristic?

Can race be erased? Coalitional computation and social categorization (December 18, 2001) PNAS vol. 98 no. 26 pg 15387–15392 Robert Kurzban, John Tooby, and Leda Cosmideshttp://www.pnas.org/cgi/content/full/98/26/15387

slide46

Random Statements

My birthday is in April.

My birthday is in June.

My birthday is in August.

My birthday is in January.

My birthdayis in February.

My birthday is in July.

My birthday is in October.

My birthday is in May.

Can race be erased? Coalitional computation and social categorization (December 18, 2001) PNAS vol. 98 no. 26 pg 15387–15392

slide47

Coalition Membership

I like orange.

Hook em’.

Acie Law is awesome.

Gig em’.

Go Aggies.

Kevin Durant is awesome.

I like Maroon.

Go Horns.

Can race be erased? Coalitional computation and social categorization (December 18, 2001) PNAS vol. 98 no. 26 pg 15387–15392

slide48

When alternate coalition membership information is introduced, race is ignored.

I like orange.

Hook em’.

Acie Law is awesome.

Gig em’.

Go Aggies.

Kevin Durant is awesome.

I like Maroon.

Go Horns.

slide49

Despite a lifetime\'s experience of race as a predictor of social alliance, less than 4 min of exposure to an alternate social world was enough to deflate the tendency to categorize by race. These results suggest that racism may be a volatile and eradicable construct that persists only so long as it is actively maintained through being linked to parallel systems of social alliance.

slide50

Two hypotheses about the origin of H. sapiens

Multiregional hypothesis: disproved by mtDNA data

“Out of Africa” hypothesis: disproved by other DNA data

slide51

Relationships of different people using mtDNA.

  • From Science v298 12/20/02 pg 2381
  • 93-95% of genetic variation within population.
  • 3-5% of genetic variation occurs between populations.

7 Daughters of Eve, fig. 2

slide53

Exam #3 W 12/5 at 7-8:30pm9am classin ETC 2.108andnoon class in ECJ 1.202

  • Review T 12/4 at 5pm in WRW 102
  • Homework #4 due now
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