Evolution: Why Sex Video

Where does the phrase "Red Queen" come from? How does it relate to a concept relevant to the evolution of sexual behavior, as illustrated in the poeciliopsis fish

"when a species stops evolving, it is doomed" Cloned fish have stopped evolving because they have same DNA. the fish with two parents, have a stronger chance.

What animal is being captured in the beginning of the video and what makes it worthy of scientific investigation?

- New Mexico whiptail lizard species which has different reproductive strategy. -All female -Offspring are clones of the mother(same genes)

What makes *Poeciliopsis* so interesting to study in terms of sex?

-Asexual reproducers were taking on more parasites (less variability)

4.1) Those cheating birds: DNA testing showed that _____% of chicks being cared or by a male bird, were not biologically theirs?

40%

1.1) What is the "Lesbian Hypothesis" regarding New Mexico whiptail?

A female-only lizard species gives birth without having had sex; each egg has a complete set of her mother's genes Female mounts a female to help get the eggs to develop. The theory is lacking evidence.

What was has Robert Vrijenhoek been studying them for 30 years in Mexico?

A fish of the genus Poeciliopsis He was looking at: asexual and sexual reproduction in Sonoran minnows to demonstrate the value of males.

5) Chimpanzees

Aggressive, Lone Females

What was the "natural experiment" that changed the characteristics of these fish?

Drought then it switched because the sexual fish, had inbreeding. Clones were doing okay. This caused them to be targeted by parasite. introducing new fish, allowed it to switched back.

6) What were the basic findings of the "smelly-t shirt" type studies, in terms of mate choice?

Females enjoyed smells that had different immune genes than their own

4.2) What bird shows a reversal of typical sex roles?

Jacanas females are larger and compete for access

5) Bonobos

Peaceful, Females in groups

5.1) What hypothesized scenario created the very different ape societies characterized by the bonobos vs chimps?

bonobos love sex chimps, not so much female solidarity in bonobos is the cause. as a result of the feeding ecology Bonobos always have herbs on the ground. Chimps live with gorillas. Chimps then have to depend on fruit trees. the scarcity of food, leads to individual scavenging.

4) Monogamy is the solution to what biological problem, from a male's perspective?

social solution to a biological issue. The child must survive and have resources

The evolutionary advantages of sex is

variability