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Flashcards in ? Just Revise Them Dude Deck (14)
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1
Q

What is disruptive selection?

A

Increases the frequency of large and small values of a trait at the expense of intermediate values

(Frequency graph looks like two camel humps)

2
Q

What is directional selection?

A

Transforms the value of a trait by increasing the frequency of individuals closer to a distant optimum

3
Q

What is stabilising selection?

A

Keeps the population at one stable optimal value

Graphs look like one hump in middle

4
Q

What are the environmental effects of a shared father?

A

Nuptial gifts

Territory quality

Parental pouch brooding

Paternal care

5
Q

What are the environmental effects of a shared mother?

A

Egg size

Egg content

Womb/pouch conditions

Milk quality

Maternal care

6
Q

What is fisherian sexual selection?

A

Exaggerated traits due to gene preference and the gene for traits are linked

7
Q

What is the handicap hypothesis?

A

Exaggerated trait due to big trait indicating that male is good quality to survive

8
Q

What is sexual selection after copulation?

A

Intrasexual- postcopulatory sexual selection

Intersexual- cryptic female choice

9
Q

What is sexual selection before copulation !

A

Intrasexual - male-male competition

Intersexual - female mate choice

10
Q

To be successful (fitness) you must have what?

A

A high number of offspring

11
Q

What is batemans rule?

A

Steepness of slope of line

Variance in Mating Success within a sex

Shape- not always linear

12
Q

What are batemans principles?

A

Males should display greater variance than females in both :

1) number of mates
2) offspring number
3) the correlation between number of mates and number of offspring should be stronger in males than in females

13
Q

What is batemans gradient ?

A

The statistical relationship between mating success and reproductive success

14
Q

What are the types of coevolutionary interactions?

A

Mutualism + +

Commensalism o +

Antagonism - +

Competition - -