Biological Science
Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
bartleby

Concept explainers

bartleby

Videos

Question
Book Icon
Chapter 27, Problem 11TYU
Summary Introduction

To review:

Whether the phenomenon of increased gene flow among humans (occurring due to intermarriage among different ethnic groups and regions of world), is increasing or decreasing the racial differences.

Introduction:

Gene flow is the movement of individuals from one area to another. This results in altered gene frequency, thus disturbing the Hardy Weinberg equilibrium.

Blurred answer
Students have asked these similar questions
Dunkers are part of a religious group which originated from 27 families that emigrated from Germany to the USA in the XVIIIth century. Dunkers only mary between themselves. The frequency of the M allele in the MN blood group system is 0.65 among Dunkers while it is 0.54 in both German and American populations. a) How can you explain this observation ? Is this due to genetic drift, natural selection, or inbreeding?
The remote South Atlantic island of Tristan da Cunha was first colonized in 1818 by exactly 20 people, 12 men and 8 women. It’s reasonable to assume that the starting genetic variation in the population was high – the men were all English while the women were primarily of African descent- so we’ll say that heterozygosity was 0.5. The breeding sex ratio in this starting population was 1:1 (which each woman having children with only a single man). Let’s also assume that the generation time across this time interval has been constant at 20 years. 1a. If these conditions held constant – what would the expected heterozygosity be in the population today (2018 to deal with a clean integer value for generations)? 1b. In 1884 the population had grown to 106 when disaster struck the island. Of the 19 adult men on the island, 15 were in the same fishing boat that capsized, leaving only 4 adult men alive on the island. These desperate times may have changed the sex ratio of the breeding population…
background: Lizards often have bright coloration and in some species there is variation in coloration within populations. For the sake of simplicity, let’s assume that color is genetically determined by a single gene with two alleles that interact in a codominant fashion: r+r+ = red, r+r- = yellow, r-r- = white. Imagine there is a large population of these lizards where 1 in 200 lizards have the white coloration, 30 are yellow and the rest are red. A tsunami sweeps through the population! Although no lizards died, 10 random lizards were swept to a nearby island. One of these individuals is white while the rest were yellow. Over time, these individuals remain stuck on the island and form a new population. Eventually, 80% of this population has the white coloration. Assume that color does not affect fitness in either population. question: At the time of the founding of the smaller population, (when 1/10 were white, the rest yellow), what was the chance of fixation of the r- allele via…
Knowledge Booster
Background pattern image
Biology
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
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
GCSE Biology - Adaptations #79; Author: Cognito;https://www.youtube.com/watch?v=tC-u8xcZYSM;License: Standard Youtube License