Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 15, Problem 2AAATB
Summary Introduction
Introduction:
Genetic drift refers to the change in the relative frequency of distinct genotypes in a small population, owing to the chance vanishing of specific genes as individuals do not reproduce or die. In the given case A, the population included 500 individuals of females and males in which the males compete heavily with the females for harems. In the given situation, the females give birth to one offspring in each season.
In the case of B, the population includes just 250 individuals, and in this, the mating bond between the females and males goes through the mating season. In the given case, the females on an average give rise to 3 to 4 offsprings in a season.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A population of horses in the magic land is having a problem. Individuals are not mating randomly
and they are only mating with those that have the same flying speed as their own: Fast (FF), Medium
speed (FS), or Slow (SS). You arrive to this magical land and count the following horses of each
flying velocity:
Fast = 71
Medium speed = 90
Slow = 31
If we consider these results Generation 1, what are the expected number of Medium speed
individuals for each genotype in Generation 3 if we have only inbreeding, that is, FF only reproduces
with FF; FS only reproduces with FS; and SS only reproduces with SS?
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?
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
Chapter 15 Solutions
Biology: Science for Life with Physiology (5th Edition)
Ch. 15 - Prob. 1LTBCh. 15 - Compare and contrast the species interactions of...Ch. 15 - Prob. 3LTBCh. 15 - Current rates of species extinction appear to be...Ch. 15 - According to the generalized species-area curve,...Ch. 15 - Prob. 6LTBCh. 15 - Prob. 7LTBCh. 15 - Which of the following is an example of a...Ch. 15 - Prob. 9LTBCh. 15 - Prob. 10LTB
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- A population of toads in the desert has a range of body sizes. The smallest and largest toads are most successful at surviving dry periods. When they mate after heavy rains there are more small and large toads present at mating sites than there are medium toads. The toads mate randomly with respect to body size (i.e.large and small toads interbreed easily). Body size is a quantitative trait under genetic control. What do you expect to happen in this situation?arrow_forwardWhen a population is at Hardy-Weinberg equilibrium which one of the following is true? Group of answer choices Genotypic frequencies change generation after generation. One can calculate the recessive allele frequency directly from the number of homozygous recessive phenotypes seen. Individuals of the same genotype are most likely to mate. Allele frequencies change generation after generation.arrow_forwardAssume 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.arrow_forward
- Which of the following is most likely to cause changes in wing color allele frequencies in Dumbledore beetles over a 10 year period? These beetles live on islands, are weak fliers, have small populations, and fitness does not vary with wing color.arrow_forwardIn 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%arrow_forwardThere are 1024 individuals with the genotype GG, 512 individuals with a genotype Gg, and 64 individuals with the genotype gg. Useless information to find the dominant allele frequency the recessive allele frequency the homozygous dominant frequency the heterozygous frequency and the homozygous recessive frequencyarrow_forward
- Assortive mating generally leads to lower diversity because; Assortive mating actually increases diversity Individuals choose to mate with individuals who are dis-similar to themselves Individuals choose to mate with other similar individuals Individuals choose to mate later in lifearrow_forwardAbout 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness; What percentage of women would be expected to be colour blind?arrow_forwardIn a population of 500 individuals in Near East, the frequencies of the dominant and recessive alleles for autosomal recessive genetic disease PKU are 0,89 and 0,11 respectively. A is used to indicate the dominant allele, a is used to indicate the recessive allele. Assuming random mating, what are the expected genotype frequencies?arrow_forward
- How Can We Measure Allele Frequencies in Populations? In a population where the females have the allelic frequencies A = 0.35 and a = 0.65 and the frequencies for males are A = 0.1 and a = 0.9, how many generations will it take to reach HardyWeinberg equilibrium for both the allelic and the genotypic frequencies? Assume random mating and show the allelic and genotypic frequencies for each generation.arrow_forwardThere is a species of fish in which homozygous recessive (rr) individuals are Yellow and homozygous dominant (RR) individuals are Red. Color in this species of fish exhibits incomplete dominance. If we mate a homozygous dominant individual with a heterozygous individual, what is the phenotypic ratio of the offspring? Group of answer choices 2 Red : 2 Orange. 4 Red. 3 Red : 1 Yellow. 1 Red : 2 Orange : 1 Yellow.arrow_forwardWhich one of the following would be considered an example of sexual selection? Similar death rates due to disease in both sexes of a species The presence of both male and female reproductive structures within each individual of a species Longer tailed males of a bird species mating more frequently on average than shorter tailed males of the same species Higher offspring survival in individuals homozygous for one type of allele compared to individuals homozygous for a different allele at the same locus The ability of a species to utilize either asexual or sexual reproductionarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage LearningBiology Today and Tomorrow without Physiology (Mi...BiologyISBN:9781305117396Author:Cecie Starr, Christine Evers, Lisa StarrPublisher:Cengage Learning
Human Heredity: Principles and Issues (MindTap Co...
Biology
ISBN:9781305251052
Author:Michael Cummings
Publisher:Cengage Learning
Biology Today and Tomorrow without Physiology (Mi...
Biology
ISBN:9781305117396
Author:Cecie Starr, Christine Evers, Lisa Starr
Publisher:Cengage Learning
Mendelian Genetics and Punnett Squares; Author: Professor Dave Explains;https://www.youtube.com/watch?v=3f_eisNPpnc;License: Standard YouTube License, CC-BY
The Evolution of Populations: Natural Selection, Genetic Drift, and Gene Flow; Author: Professor Dave Explains;https://www.youtube.com/watch?v=SRWXEMlI0_U;License: Standard YouTube License, CC-BY