What is meant by “sexual selection”? a. Having an XX or XY chromosome pattern determines whether one develops as a female or a male. b. Hormones during a sensitive period produce longlasting effects on anatomy and behavior. c. Some people choose to switch from one gender identity to another. d. Evolution favors characteristics that make an individual more appealing to the opposite sex.

What is meant by “sexual selection”? a. Having an XX or XY chromosome pattern determines whether one develops as a female or a male. b. Hormones during a sensitive period produce longlasting effects on anatomy and behavior. c. Some people choose to switch from one gender identity to another. d. Evolution favors characteristics that make an individual more appealing to the opposite sex.

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter17: Processes Of Evolution

Section: Chapter Questions

Problem 4SA

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Of the following, which is the least plausible hypothesis for why natural selection has not eliminated genes for male homosexuality? a. Perhaps the relatives of a homosexual male have more than an average number of children. b. Homosexual people might spread their genes by helping their brothers and sisters rear their children. c. Maybe there is no gene for homosexuality. Instead, an environmental event produces an epigenetic effect that can be transmitted from one generation to the next. d. Some homosexual men have children.
What are the Equality in the Sexes in Human Evolution? Why is this important to learn?
Which of these situations offers the lowest “opportunity for selection” for males? A. Females choose mates with a fancy ornament. B. Every female chooses one male to mate with for life. C. Locations that females need access to in order to reproduce are rare. D. Males fight each other for access to groups of females.
What is the difference between monozygotic (MZ) and dizygotic (DZ) twins?A. MZ twins develop from two eggs, whereas DZ twins develop from a single egg.B. MZ twins develop from a single egg, whereas DZ twins develop from two eggs.C. MZ twins are one male and one female, whereas DZ twins are of the same gender.D. MZ twins are of the same gender, whereas DZ twins are one male and one female.
That African infants tend to walk earlier than Western infants suggests that walking: a. that race determines the earliest age of walking. b. is a completely adaptive behaviour to the particular environment in which the infant is raised. c. is not completely controlled by genetics. d. follows a proximodistal progression.
In Biology of Beauty, Cowley found that contemporaryfemales are attracted to males with broad foreheads and strong chins, and that this effect persisted across different cultures. How did Cowley explain this result? A. This is a trick question- this attraction is culturally relative B. Males compete for access to females by developing these features as a form of male-male competition C. There is no evidence that females really are differentially attracted to males with these features D. Attraction to males with these features is adaptive for females because males with these traits are usually sexually mature and have healthy immune systems E. Only some human cultures value these traits as attractive.
f you had two guinea pigs of opposite sex, both homozygous, one black and one brown, but you didn't know which was the dominant characteristic, how would you find out the dominant color? Select one: a. Mate them and see what color the offspring are-the other will be the dominant color b. Mate them and see what color the offspring are-that will be the dominant color c. The dominant color could not be determined by mating the two, then mating their offspring; further generations would have to be produced to determine the dominant color d. Mate them together, then mate their offspring to see what color the next generation is-the other color will be the dominant color e. Mate them, then mate their offspring to see what color the next generation is-that will be the dominant color
Which of the following statements is an evolutionary advantage of sex and sexual reproduction? A. Sex and recombination results in decreased genetic variation in a population and maintains advantageous traits. B. Sex and recombination can bring beneficial alleles together when producing offspring. C. Sex and recombination results in the inheritance of all the genetic information available from both parents. D. Reproduction is less risky when gametes from two individuals must fuse.
What is the purpose of studying "Equality in the Sexes in Human Evolution"?
Researchers are very interested in studying identical twins separated at birth and raised apart. So far, data suggests that such twins are more alike than researchers predicted; they frequently have similar personalities, mannerisms, habits, and interests. What general questions do you think researchers hope to answer by studying such twins? Why do identical twins make good subjects for this research? What abuses might occur if the studies are not evaluated critically and if the results are carelessly cited to support a social agenda?
Which statement about an individual that is homozygous for an allele is FALSE? Select one: a. Its parents were necessarily homozygous for that allele. b. Each of the gametes it produces will contain one copy of that allele. c. It will pass that allele to its offspring. d. It is true-breeding with respect to that allele. e. Each of its cells possesses two copies of that allele.
in sexual selection I need an explanation of why one sex is more choosy than the other