EXAM 2 REVIEW BIOLOGY 109
QUESTIONS AND ANSWERS
Can male-male competition evolve if the preferred male trait reduces survival? -
ANSWER-Yes.
If females prefer males with a particular trait (like a cricket's call), the offspring will... -
ANSWER-- carry genes for the sexy trait
- carry genes that predispose females to prefer that trait
After several generations, the population will show... - ANSWER-- extreme forms of
the showy trait in males
- extreme degrees of preference for the trait by females
What is the LEAST optimal reproductive strategy for females?
- Keep males from mating with other females.
- Mate with the male with the best genes.
- Get males to fight over access to you as a mate.
- Mate with males that other females prefer to mate with.
- Mate with males that give you more resources.
- Mate with several males.
- Keep males from giving resources to other females. - ANSWER-Keep males from
mating with other females.
Which of the clues ARE USELESS in helping a ♂ tell which ♀'s have the best
genes?
- The best males... have fewer parasites.
- The best males... have immune system alleles that differ from hers.
- The best males... have bigger/showier ornaments.
- The best males... provide resources to the female.
- The best males... waste their resources.
- The best males... beat other males in fights. - ANSWER-All of these clues are
useful
Does the sweaty t-shirt experiment demonstrate that humans evolved to (or retain an
ancient adaptation to) prefer mates that give their offspring heightened immunity? -
ANSWER-No
Alternative Mating Strategies - ANSWER-- Sneaky Copulator Strategy
- Cooperating Male Strategy
- Satellite Male Strategy
Runaway Sexual Selection - ANSWER-Proceeds until male survival is too low to
offset sexual advantages
Handicap Principle - ANSWER-Extravagance = excess ability/resources = GOOD
GENES
QUESTIONS AND ANSWERS
Can male-male competition evolve if the preferred male trait reduces survival? -
ANSWER-Yes.
If females prefer males with a particular trait (like a cricket's call), the offspring will... -
ANSWER-- carry genes for the sexy trait
- carry genes that predispose females to prefer that trait
After several generations, the population will show... - ANSWER-- extreme forms of
the showy trait in males
- extreme degrees of preference for the trait by females
What is the LEAST optimal reproductive strategy for females?
- Keep males from mating with other females.
- Mate with the male with the best genes.
- Get males to fight over access to you as a mate.
- Mate with males that other females prefer to mate with.
- Mate with males that give you more resources.
- Mate with several males.
- Keep males from giving resources to other females. - ANSWER-Keep males from
mating with other females.
Which of the clues ARE USELESS in helping a ♂ tell which ♀'s have the best
genes?
- The best males... have fewer parasites.
- The best males... have immune system alleles that differ from hers.
- The best males... have bigger/showier ornaments.
- The best males... provide resources to the female.
- The best males... waste their resources.
- The best males... beat other males in fights. - ANSWER-All of these clues are
useful
Does the sweaty t-shirt experiment demonstrate that humans evolved to (or retain an
ancient adaptation to) prefer mates that give their offspring heightened immunity? -
ANSWER-No
Alternative Mating Strategies - ANSWER-- Sneaky Copulator Strategy
- Cooperating Male Strategy
- Satellite Male Strategy
Runaway Sexual Selection - ANSWER-Proceeds until male survival is too low to
offset sexual advantages
Handicap Principle - ANSWER-Extravagance = excess ability/resources = GOOD
GENES
