Which of the following statements is true about certainty of paternity? Question 12 options: Certainty of paternity is low when egg laying and mating occur together, as in external fertilisation. Certainty of paternity is high in most species with internal fertilisation because the acts of mating and birth are separated by time. Certainty of paternity is low when males guard females they have mated. Paternal behaviour exists because it has been reinforced over generations by natural selection

Which of the following statements is true about certainty of paternity? Question 12 options: Certainty of paternity is low when egg laying and mating occur together, as in external fertilisation. Certainty of paternity is high in most species with internal fertilisation because the acts of mating and birth are separated by time. Certainty of paternity is low when males guard females they have mated. Paternal behaviour exists because it has been reinforced over generations by natural selection

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter12: Processes Of Evolution

Section: Chapter Questions

Problem 4SQ

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In a population of snails, two alleles, T and t, affect the thickness of the shell, and the degree to which the snails are protected from predation. TT individuals have thick shells, which repel predators, and survive best. Tt individuals have medium shell thickness and survive 88% as well as do TT individuals. tt individuals have thin shells and are easy for predators to eat; they survive only 14% as well as do TT individuals. In a population of gametes at the start of a generation, the frequency of the t allele is 0.23. What is the frequency of the t allele in the gametes that will produce the next generation? 91% 77% 23% 18% cannot calculate with the information given 34%
within a randomly mating population of beagles, the homozygous presence of the recessive allele 'm' causes lemon color pattern, while the presence of dominant allele M produce a tri-color pattern. A survey was made in a town and of the 167 tagged, 83 has lemon color. Question: Determine the frequency of the dominant allele; number of animals have the dominant allele; number of animals that are heterozygous; number of animals that have homozygous recessive gene.
You are observing a grouse population in which two feather phenotypes are present in males. One is relatively dark and blends into the shadows well, and the other is relatively bright and more obvious to predators. The females are uniform dark feathered. Observing the frequency of mating between females and the two types of males, you have recorded the following: Mating’s with dark feathered males: 13 mating’s with a bright feathers male: 32 Propose a hypothesis to explain why females apparently prefer bright feathered males. What selective advantage might there be in choosing a male with alleles that make it more susceptible to predation? What data would help test this hypothesis?
Which of the following statements about the theories of senescence is correct? Question 2 options: The reason why organisms become old and decrepit is because an individual would often have accumulated too much energy in its lifetime in the form of fat reserve; therefore, an older individual often dies from old-age related diseases. An allele that shows its deleterious effect later in life will always have a smaller impact on an organism's fitness than an allele that shows its deleterious effect early in life. Therefore, late-acting deleterious mutations can be fixed in the population, resulting in shortened lifespans. The allele that can result in early reproduction will always be selected for, even if it comes with a cost of earlier senescence. Typically, for species that live fast would usually die young. None of the above
Elephant seals are a sexually dimorphic species of marine mammal that lives off the coast of California. The females, which weigh around 1000 lbs, are much smaller than the males, which may weigh up to 5000 Ibs. Suppose that scientists measured the weight of three adult female elephant seals and their female offspring. Parent Weight Offspring Weight 920 742 999 780 1014 787 Calculate the narrow sense heritability, h', of weight for female elephant seals to two decimal places. What conclusions can be drawn from these data?
Elephant seals are a sexually dimorphic species of marine mammal that lives off the coast of California. The females, which weigh around 1000 Ibs, are much smaller than the males, which may weigh up to 5000 Ibs. Suppose that scientists measured the weight of three adult female elephant seals and their female offspring. Parent Weight Offspring Weight 920 742 999 780 1014 787 Calculate the narrow sense heritability, h, of weight for female elephant seals to two decimal places. h?: What conclusions can be drawn from these data?
Johnston et al. estimate that 50% of males with the Ho Ho genotype develop scurs (instead of full horns). They also estimate that around 13% of the total male population, at birth, will develop scurs. The males who managed to get access to mating opportunities with females seem to show no preference for whether the females have horns or not. Thus in the adult mating population, mating is random with respect to the genotype at this locus. What is the frequency of the Hop allele in the population?
Assume you are studying a species of slug where the eggs are fertilized and transferred to the male. As a result the male is not able to increase reproductive success by mating with multiple partners. Therefore which of the following about sexual selection in this species is not true? Females are more likely to develop traits that signal genetic quality to males. Females will be able to increase reproductive success with increased mating partners. Sexual selection in males will lead them to be choosy with what females they mate with. Sexual selection in males will lead them to mate indiscriminately when they find a female.
Elephant seals are a sexually dimorphic species of marine mammal that lives off the coast of California. The females, which weigh around 1000 lbs, are much smaller than the males, which may weigh up to 5000 lbs. Suppose that scientists measured the weight of three adult female elephant seals and their female offspring. Parent Weight Offspring Weight 920 742 999 780 1014 787 Calculate the narrow sense heritability, h², of weight for female elephant seals to two decimal places. h²: Attempt 2 ▼ What conclusions can be drawn from these data? Both genetic and environmental factors are important in determining the weight of female elephant seals.
Which of the following fitness relationships among three genotypes at a single locus represents the pattern expected with overdominance? Qw11= w22 > w12 w12= w11= w22 w12 » w11 > w22 w11 » w12 > w22 Ow11> w22 > w12
Sex determination is primarily governed by either the male heterogamety of XX/XY type or female heterogamety of ZW/ZZ type with a seemingly one-to-one sex ratio of males to females. Many breeders of mammals would prefer a bias though towards a greater proportion of females to males due to males being overall less productive to females. What benefit is there is having a relatively equal proportion of male to female offspring when, in production terms, this is less then desirable?
Which of the following models of sexual selection may result in phenotypes that are not beneficial or even disadvantageous to the survival of the organism on which it acts? Direct benefits O Good genes (with the handicap principle) Runaway selection Sensory bias All of the above O None of the above

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	Certainty of paternity is low when egg laying and mating occur together, as in external fertilisation.
	Certainty of paternity is high in most species with internal fertilisation because the acts of mating and birth are separated by time.
	Certainty of paternity is low when males guard females they have mated.
	Paternal behaviour exists because it has been reinforced over generations by natural selection