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BIOL 150 (EXAM 2) > Part 2 > Flashcards

Part 2 Flashcards

1
Q

DNA & mating

A

Variation is heritable

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2
Q

Giraffe long neck/short neck

A

Variation exists amongst individuals in a population

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3
Q

short neck can’t reach high trees & can starve

A

Survival & reproduction success is variable

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4
Q

Long neck can reach trees & eat more

A

Non random survival & reproduction

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5
Q

No evolutionary change

A

Assumptions

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6
Q

Random mating

A

mating by chance

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7
Q

No natural selection

A

all members contribute to number of gametes in a pool

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8
Q

No genetic drift

A

no changing of frequencies

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9
Q

No gene flow

A

all alleles from original populations gene pool

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10
Q

No mutation

A

no alleles

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11
Q

NOT an evolutionary process, but CAN change phenotype frequencies

A

Random mating

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12
Q

Inbreeding

A

Non-random mating

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13
Q

Assortative mating

A

non-random mating

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14
Q

Mating between close relatives

A

inbreeding

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15
Q

Preferential mating between those with some genotype + phenotype

A

Assortative mating

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16
Q

Individuals of different species are prevented from mating

A

Pre-zygotic isolation

17
Q

Individuals from different populations DO MATE, but hybrid have low fitness and don’t survive or reproduce

A

Post-zygotic isolation

18
Q

Biologist use 3 approaches?

A
  1. Biological species concept
  2. Morphological species concept
  3. phylogenetic species concept
19
Q

Populations reproductively isolated from each other

A

Biological species concept

20
Q

Populations that are constantly morphologically distant from each other

A

Morphological species concept

21
Q

Based on evolutionary history of populations

A

Phylogenetic species concept

22
Q

Gene pool isolation due to geographical isolation

A

Allopatric Speciation

23
Q

Organisms colonize new habitat —> new populations

A

Dispersal

24
Q

Physical barrier splits population into subgroups

A

Vicarience

25
Q

Barrier to gene floe isolates populations

A

Genetic isolation

26
Q

Mutation, selection, and genetic drift in isolated populations cause divergence

A

Genetic divergence

27
Q
  1. Gene pool isolation
  2. evolutionary changes
  3. reproductive isolation
A

speciation simplified

28
Q

Genetic isolation via assortative mating (gene flow stops bc of this)

A

Sympatric speciation

29
Q

Changes in chromosomes number confer reproductive isolation (gene flow stops bc change in chromosome numbers)

A

Polyploid speciation

30
Q

results in hybrid offspring inhibiting a new environment

A

Hybrid speciation

BIOL 150 (EXAM 2) (3 decks)

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