Mechanisms/Rates Of Speciation P2 Flashcards

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0
Q

When it works with natural selection:

A

Direct benefit to females
Good genes hypothesis
Sensory bias

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1
Q

Competition for mates and access to fertilisation a that’s results in differential reproductive success

A

Sexual selection definition

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2
Q

When it opposes natural selection:

A

Fisherian runaway selection

Chase away selection

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3
Q

Natural selection favours fecundity and survival. Sexual selection favours:

A

Fertilisation a and mate acquisition

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4
Q

Sexual selection has differences in route and strength to natural selection, they are:

A

Faster and consistent direction

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5
Q

Does sexual selection build linkage disequilibrium?

A

More effectively yes

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6
Q

Can contribute and inhibit divergence?

A

Yes both

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7
Q

Provided it is ecologically divergent, sexual selection can generate what?

A

Prezygotic isolation

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8
Q

Ecological interactions with sexual selection are:

A

Food resources
Parasitism
Sensory bias
Predation

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9
Q

Mortality costs on sexual ornaments and affects female preference

A

Predation

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10
Q

Evolution of mating system affected by environmental factors eg polygamy

A

Food resources - clumped resources results in polygamy as females choose make with the most resourceful territory

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11
Q

Exploitation of host sexual signals

A

Parasitism

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12
Q

Females pay attention to ecological environment to aid mate choice

A

Sensory bias

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13
Q

Speciation and sexual selection are both hard to measure

A

So it is difficult to establish if sexual selection leads to speciation

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14
Q

Time For Speciation

A

Time for reproductive isolation to evolve once process has started

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15
Q

Biological Separation Interval

A

Average time of origin of species and when species branches again

16
Q

Reduced level of gene flow and more space to diverge from parental population results in

A

A larger area where more speciation is likely to occur. Area size effect