EBK BIOLOGY
EBK BIOLOGY
10th Edition
ISBN: 8220100474729
Author: Martin
Publisher: Cengage Learning US
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Chapter 19, Problem 5TYU
Summary Introduction

Introduction: A gene can be referred to as a unit of hereditary. They pass information from one generation to another. The genes contain DNA which decides the genotype of an individual. There are many methods for analysis of DNA such as polymerase chain reaction, gel electrophoresis, DNA sequencing and so on.

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Analysis of DNA sequences for a particular locus among individuals within a population provides biologists with one way to estimate (a) genetic drift (b) genetic polymorphism (c) gene flow (d) heterozygote advantage (e) frequencydependent selection
Evolution is most accurately described as a change in allele frequencies in over time. (a) an individual (b) a species (c) a population (d) a community
Which of the following is not true of natural selection?(a) natural selection acts to preserve favorable traits and eliminate unfavorable traits (b) the offspring of individuals that are better adapted to the environment will make up a larger proportion of the next generation (c) natural selection directs the course of evolution by preserving the traitsacquired during an individual’s lifetime (d) natural selection Test Your Understanding acts on a population’s genetic variability, which arisesthrough mutation (e) natural selection may result in changes in allele frequencies in a population

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Genetic Variation and Mutation | 9-1 GCSE Science Biology | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=bLP8udGGfHU;License: Standard YouTube License, CC-BY