genetic variation

What Distinguishes Disruptive And Directional Selection Pressures When Both Select For Extreme Genetic Traits?

by

What Distinguishes Disruptive And Directional Selection Pressures When Both Select For Extreme Genetic Traits? What distinguishes disruptive and directional selection pressures when both select for extreme genetic traits? … Disruptive selection What is the difference in directional and disruptive selection? In directional selection, a population’s genetic variance shifts toward a new phenotype when exposed to

What Are The Two Main Factors Responsible For Phenotypic Variation?

by

What Are The Two Main Factors Responsible For Phenotypic Variation? An organism’s phenotype results from two basic factors: the expression of an organism’s genetic code, or its genotype, and the influence of environmental factors. Both factors may interact, further affecting phenotype. What are the 2 main things that determine an organism’s phenotypic traits? To summarize,

What Is An Example Of Descent With Modification?

by

What Is An Example Of Descent With Modification? Which example illustrates descent with modification—a change in gene frequency What does descent with modification mean give examples be specific? Descent with modification refers to the passing on of traits from parent organisms to their offspring. This passing on of traits is known as heredity, and the

What Can Happen To Allele Frequencies When A Population Goes Through A Bottleneck Or We Have A Small Founding Population?

by

What Can Happen To Allele Frequencies When A Population Goes Through A Bottleneck Or We Have A Small Founding Population? A population bottleneck yields a limited and random assortment of individuals. This small population will now be under the influence of genetic drift for several generations. Why does a population bottleneck lead to changes in

What Increases And Decreases Genetic Variation?

by

What Increases And Decreases Genetic Variation? Mutation, recombination, and gene flow all act to increase the amount of variation in the genotypes of a given population. There are also forces at work that act to decrease this variability. What factors increase genetic variation? Gene duplication, mutation, or other processes can produce new genes and alleles

What Is An Example Of Continuous Variation?

by

What Is An Example Of Continuous Variation? Human height is an example of continuous variation. It ranges from that of the shortest person in the world to that of the tallest person. Any height is possible between these values. So it is continuous variation. What is continuous variation and give example? Continuous variation is the

What Happens When A Population Is In Hardy-Weinberg Equilibrium?

by

What Happens When A Population Is In Hardy-Weinberg Equilibrium? Key points: When a population is in Hardy-Weinberg equilibrium for a gene, it is not evolving, and allele frequencies will stay the same across generations. There are five basic Hardy-Weinberg assumptions: no mutation, random mating, no gene flow, infinite population size, and no selection. What must

What Increases Random Genetic Drift?

by

What Increases Random Genetic Drift? Genetic drift is a random process that can lead to large changes in populations over a short period of time. Random drift is caused by recurring small population sizes, severe reductions in population size called “bottlenecks” and founder events where a new population starts from a small number of individuals.

What Increases Gene Flow?

by

What Increases Gene Flow? Migrants change the distribution of genetic diversity among populations, by modifying allele frequencies (the proportion of members carrying a particular variant of a gene). … When gene flow is impeded, there can be an increase in inbreeding, measured by the inbreeding coefficient (F) within a population. What produces gene flow mutation?

What Is Genetic Variation In Population?

by

What Is Genetic Variation In Population? Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing environmental circumstances. What does variation in a population mean? Genetic variation is a measure of the genetic differences that exist within a