Natural Selection (W3-L2) Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

What are the modes of selection?

A

Heterozygote advantage, directional, under-dominance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Heterozygote Advantage

A

Selection favors the heterozygote phenotype (bell curve)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Directional Selection

A

Selection favors a specific phenotype over the others, (bell curve with tail)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Underdominance

A

Selection against heterozygote phenotype, leads to disruptive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Balancing selection

A

broad definition of selection that maintains variation within the population

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Mean Fitness of the population

A

(Relative fitness of the genotypes)*(frequencies of the genotypes)

p^2(WAA)+2pq(WAa)+q^2(Waa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Survival Rate

A

surviving # of individuals with a genotype / original # of individuals with a genotype

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Relative fitness

A

survival rate of specific genotype / highest survival rate across all genotypes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Selection coeffcients

A

the magnitude of selection against a particular genotype

1-WAA
1-WAa
1-Waa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Frequency of surviving adults

A

(Genotype frequency * Relative fitness) / mean fitness

ex. AA : p^2WAA / Wmean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Frequencies of alleles in respect to relative fitness

A

A=p^2WAA / Wmean + pqWAa/ Wmean

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Systematics

A

The study of the diversification of living forms, both past and present, and the relationships among living things through time

ordering of the diversity of nature through construction of a classification

contains phylogenetic and taxonomy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Taxonomy

A

The discovery, recognition, definition and naming of groups

organisms grouped together into taxa with rank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Linnaean taxonomic system

A

taxa are assigned to a rank

species name is binomial : genus/species

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Problems with linnaean system

A
  1. does not reflect phylogeny
  2. content of taxon is primarily an issue of convention
  3. ranks are based on convention
  4. there are not enough ranks
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

PHylogenetics

A

study of evolutionary relationships among groups of organisms resulting in a hypothesis about the evolutionary history of taxonomic groups

hypothesis is represented by a phylogenetic tree of life

17
Q

What are the three domains of life

A

Eukaryokes, bacteria, archea

18
Q

Cladogenesis

A

evolution that results in the splitting of a lineage

19
Q

Anagenesius

A

evolution within a lineage