0
Heterozygous individuals pass the dominant and recessive alleles to offspring.
What else can I help you with?
How is the sickle-celled allele maintained through natural selection?
Individuals with two recessive alleles have very high rates of reproduction.
How is the sickle cell allele maintained through natural selection?
Individuals with two recessive alleles have very high rates of reproduction.
Does natural selection on single-gene trait cannot lead to changes in allele frequencies?
Natural selection acting on a single-gene trait can lead to changes in allele frequencies within a population. If individuals with a certain allele have a selective advantage, they are more likely to survive and reproduce, leading to an increase in the frequency of that allele in the population over time. This process is known as directional selection.
People with one sickle cell allele are not likely to get a malaria what is this an example of?
It is an example of Natural Selection, Modern Theories of Evolution.
Which evolutionary mechanisms could affect allele frequencies in a population being maintained in captivity?
Genetic drift, selection pressures imposed by captivity conditions, inbreeding, and genetic bottlenecks due to small population sizes are some evolutionary mechanisms that can affect allele frequencies in a population being maintained in captivity. These factors can lead to changes in the genetic diversity of the population over time.
When a mutation first occurs a different allele is formed what best describes the frequency of this allele?
When a mutation first occurs, the frequency of the new allele is very low in the population. Over time, if the allele confers a selective advantage, it may increase in frequency through natural selection.
What does it mean when an allele reaches fixation in a population?
When an allele reaches fixation in a population, it means that all individuals in the population carry that specific allele, and no other alleles for that gene are present. This can happen through natural selection, genetic drift, or other evolutionary processes.
What effect does natural selection have on the frequency of a recessive lethal allele?
Perhaps not much as the recessive allele is masked in heterozygous condition. Depends on penetration and expresivity of the lethal allele, but any homozygous expression is fatal, so one can expect negative frequency selection; the freqiency is kept low by selection.
What is natural selection and how does natural selection evolution?
A simplified explanation. Natural selection is the nonrandom survival and reproductive success of randomly varying organisms who by this reproductive success change the allele frequency over time in populations of organisms, which is evolution.
What process would most likely act against any offspring with an allele for cataracts?
natural selection
How do allele frequencies remain constant while genotype frequencies evolve over time?
Allele frequencies remain constant in a population when certain conditions are met, such as no mutations, no gene flow, random mating, a large population size, and no natural selection. Genotype frequencies can change over time due to factors like genetic drift, natural selection, and non-random mating. As long as the conditions for constant allele frequencies are maintained, the overall genetic makeup of the population remains stable even as individual genotypes may change.
Which is more likely to be true natural selection or evolution?
Evolution, of course. Evolution can happen without natural selection in some cases; drift, flow. Generally though, natural selection causes evolution and then, by definition, would come first.
