sexual selection

Question 1

natural selection vs sexual selection

Answer 1

• natural selection selects traits that are best suited to the environment for survival
• sexual selection selects traits that help attract mates, even if the trait is harmful to survival

Question 2

anisogamy

Answer 2

form of sexual reproduction where two gametes of different sizes fuse together (sperm and egg)

Question 3

isogamy

Answer 3

fusion of gametes that are identical in size and structure

Question 4

sniper vs shotgun

Answer 4

sniper: females carefully choose a mate based on specific traits, ensuring offspring inherit favorable traits. Trade off is lower reproductive output

shotgun: males mating with as many partners as possible, genetic diversity. Trade off is less favorable traits inherited

Question 5

intersexual selection

Answer 5

individuals of one sex choose a mate from the opposite sex

Question 6

intrasexual selection

Answer 6

members of the same sex compete for mates

Question 7

polygyny

Answer 7

one male mates with multiple females

Question 8

monogamy

Answer 8

singular male and female mate

Question 9

polyandry

Answer 9

one female mates with multiple males

Question 10

polygynandry

Answer 10

multiple partners in general

Question 11

sexual dimorphism

Answer 11

the physical difference between males and females within the same species

Question 12

maladaptive traits

Answer 12

harmful to an organisms’ chance of survival but evolved to attract mates

Question 13

runaway selection / fisher process

Answer 13

traits evolving rapidly due to preference from the opposite sex

Question 14

dominant approach

Answer 14

most dominant individuals have the greatest reproductive success (physical displays of power or aggressive behavior)

Question 15

sneakers

Answer 15

smaller, less dominant males avoid competition and sneak to mate with females

Question 16

satellites

Answer 16

intercepting females that approach signaling malees

Question 17

protandry

Answer 17

male reproductive organs mature before female organs

Question 18

protogyny

Answer 18

female reproductive organs mature before male organs

Question 19

serial bidirectional

Answer 19

where two traits have mutual influence between interacting species. a change in one trait leads to another and vice versa

Question 20

geographical distribution

Answer 20

the geographic distribution of a species can influence the intensity and direction of sexual selection. Sexual selection can also shape geographic variation in traits across populations