CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
10th Edition
ISBN: 9780136538820
Author: Taylor
Publisher: INTER PEAR
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Chapter 35, Problem 12TYK
Summary Introduction
To hypothesize: About the chimpanzee mating system that could be tested by observing one of the groups and the data that would be collected to test hypothesis and also interpret the results.
Concept introduction:
Mating system is a way to build sexual behavior that ensures the inheritance of gene. In chimpanzee the male exhibit behavior patterns like physical force or engaging females in some activities that disarms the female resistance for mating. The females in chimpanzees can mate with many males unless the dominant male stops them to do so.
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Consider the temperature effect in the sex determination of a turtle species represented in the graph below.
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What effect would a decrease in temperature below the epivotal temperature have on sex ratios of these turtles?
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FT
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Fewer males and females will result.
None of the other answers is correct.
No difference in the proportion of females to males will result as only colder temperatures will alter the sex ratio in the offspring.
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In seahorses, males incubate and care for offspring. Thus, the males are more likely to be tied up in reproduction at any point in time relative to females. Which sex do you predict will be the choosey sex in this species and why?
Males -- because fewer are available to mate
Males – because male-male competition is incredibly strong
Females – because sperm are cheap to produce
Female – because the operational sex ratio is biased in their favor
The sperm of chimpanzees have faster swimming speeds than those of gorillas. Based on what you know about sperm competition, what would you predict about differences between these two species in female re-mating frequency and sperm viability?
In chimps, females mate only once and sperm are viable for only a day
In chimps, females mate multiply and sperm live for a long time
In chimps, females mate only one, and sperm live for a long time
In chimps, females mate multiply, and sperm live for only a day
Which of the following sexual traits is…
Mate guarding is an evolved response to sperm competition. Chimpanzee (Pan troglodytes) females regularly mate with several males in the same estrous cycle, whereas gorilla (Gorilla gorilla) females almost never do, since they typically live in bands, each controlled by a single, powerful male. How large (as a proportion of body size) should the testes of chimpanzee males be relative to gorilla testes (Harcourt et al. 1981)? If the testes of men are more similar to those of chimpanzees, what would this tell us about the intensity of sperm competition during our evolutionary past? If, on the other hand, human testes resemble those of gorillas, what conclusion is justified?
Please don't write from any online source.
Chapter 35 Solutions
CAMPBEL BIOLOGY:CONCEPTS & CONNECTIONS
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