Sage-Tips

What happens when a population has no mutations?

No mutation: If new alleles are produced by mutation or if alleles mutate at different rates, allele frequencies may change from one generation to the next. No migration: Movement of individuals in or out of a population alters allele and genotype frequencies.

Is evolution of a population possible without mutations?

Whether that fitness is affected by genetic disorders, venomous saliva or enlarged offspring, heritable variation can only arise by mutation. Evolution is simply not possible without random genetic change for its raw material.

How do mutations affect genetic diversity in a population?

The flow of individuals in and out of a population introduces new alleles and increases genetic variation within that population. Mutations are changes to an organism’s DNA that create diversity within a population by introducing new alleles.

What will most likely happen to the genetic diversity in the population over time?

What will most likely happen to the genetic diversity in the population over time? Genetic diversity will decrease because existing alleles will be lost and few new alleles will be introduced.

Which of the following is not a condition that must be met for a population to be at Hardy-Weinberg equilibrium?

Explanation: Hardy-Weinberg equilibrium has a set of conditions that must be met in order for the population to have unchanging gene pool frequencies. There must be random mating, no mutation, no migration, no natural selection, and a large sample size. It is not necessary for the population to be at carrying capacity.

Which statement is a reason that modern human populations never reach Hardy-Weinberg equilibrium?

Which statement is a reason that modern human populations never reach Hardy-Weinberg equilibrium? Evolution rarely occurs in human populations. Mating is random in human populations.

Why does evolution happen to a population and not an individual?

Individual organisms don’t evolve. Populations evolve. Because individuals in a population vary, some in the population are better able to survive and reproduce given a particular set of environmental conditions.

Why is population genetics important?

The fundamental importance of population genetics is the basic insights it provides into the mechanisms of evolution, some of which are far from intuitively obvious. As our knowledge of how genomes are organized and function has increased, so has the range of problems confronted by population geneticists.

Which population would be more likely to be affected by genetic drift?

Small populations tend to lose genetic diversity more quickly than large populations due to stochastic sampling error (i.e., genetic drift). This is because some versions of a gene can be lost due to random chance, and this is more likely to occur when populations are small.

What are the five assumptions that must be met for a population to be in Hardy-Weinberg equilibrium?

The conditions to maintain the Hardy-Weinberg equilibrium are: no mutation, no gene flow, large population size, random mating, and no natural selection. The Hardy-Weinberg equilibrium can be disrupted by deviations from any of its five main underlying conditions.

How do mutations increase the amount of diversity within a population?

Mutations increase the amount of diversity within a population/species. Mutations increase the amount of diversity within a population/species. Mutations are the primary source of genetic diversity. By introducing new alleles into the population, the population becomes more heterogeneous.

What is the primary source of genetic diversity?

Mutations are the primary source of genetic diversity. By introducing new alleles into the population, the population becomes more heterogeneous.

What is a major theoretical goal in the study of mutations?

A major theoretical goal in the study of the population genetics of mutations is to understand how mutations change populations in the long term.

What is the significance of genetic variation in humans?

Almost all human genetic variation is relatively insignificant biologically; that is, it has no adaptive significance. Some variation (for example, a neutral mutation) alters the amino acid sequence of the resulting protein but produces no detectable change in its function.