Log in
HomeClass Notes1,200,000CA670,000

BIOL 121 Lecture Notes - Allele Frequency, Soapberry, Allopatric Speciation

39 views3 pages
blushmule307
6 Apr 2012
School
UBC
Department
Biology
Course
BIOL 121
Professor
Carol Pollock

For unlimited access to Class Notes, a Class+ subscription is required.

terubarenuka and 39551 others unlocked
BIOL 121 Full Course Notes
44
BIOL 121 Full Course Notes
Verified Note
44 documents

Document Summary

Evolution 6: sexual selection (insert notes from previous day ) Experiment examples to prove that females do show this choosing behavior. * runaway traits: are far beyond what would be useful for natural selection, however they continue because the females continue to choose them = reproduction. Examples of runaway traits: plumage of birds, heavy pigmentations to attract females. Pheromones are hormones that produce a chemical response in the opposite sex. Experiment: they had males and females from universities. 1 males had to sleep in a shirt tonight and no added chemicals (no washing or deodorant) and these shirts were then exposed to females. Mhc major histocampability complex a way to measure how genetically close someone people are. Result: they found the males shirts with different mhc (if they were not on the pill), those on the pill preferred those with similar mhc. Fertile = want someone very different genetically to have healthy offsprings.

Get access

Grade+
$40 USD/m
Billed monthly
Grade+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
10 Verified Answers
Class+
$30 USD/m
Billed monthly
Class+
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
7 Verified Answers

Related Documents

BIO220H1 Lecture Notes - Lecture 15: Antigen, Nuptial Gift, Side Effect
rosebadger889
BIOL 3062 Lecture Notes - Lecture 13: Fisherian Runaway, Foster Care, Feedback
blushwoodchuck89
BIO220H1 Lecture Notes - Lecture 15: Satin Bowerbird, Parental Investment, Pipefish
yellowcattle940

Related Questions

1.Why would you predict that females in species with internal fertilization and long periods of gestation would be choosier in selecting their mates than females in other species that lack these traits?

2.As we talked about in elephant seals, in many species, there is much greater variance in male reproductive success than in female reproductive success. This could result from a few dominant males controlling the access to the breeding grounds the females need to give birth. There are other ways, however, to get the same pattern of variance in male reproductive success WITHOUT males controlling access to a resource or to females. How might you get the same variance in male reproductive success via intersexual selection?

What underlying difference in the reproductive biology of males and females drives sexual selection? (In other words, why is it usually males whose morphologies are conspicuously shaped by sexual selection, rather than females) What are some of the possible outcomes of sexual selection?

Explain sexual selection in peacocks. Peahen(females) favor peacocks(males) with long showy tail feathers with eye spots. How is that an adaptive thing to do? Then explain how choosing such males can result in more adapted females who do not have long tail feathers.