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How can a wide range of phenotypes increase the chance that some indivisuals will survive in a changing environment?
Wiki User
∙ 8y ago
Genetic variation is fundamental to evolution. The less variation there is the slower and less effective evolution becomes. Evolution works by selecting for or against different variations of a trait. In this way species are able to adapt to environmental changes.
Species that have many variations of a trait are better suited to adapt to environmental changes by evolving. A classic example of this is the gene that codes for hemoglobin. Many alleles (or variations) exist for this gene due to genetic mutations. 2 common variations are the HbA and HbS alleles. HbA is dominant and codes for normal hemoglobin. HbS on the other hand is recessive and codes for mutant sickled hemoglobin. So individuals that are homozygous HbS (they have the HbS/HbS genotype) have a deadly disease called sickle cell anemia. However, in certain parts of the world malaria is a common disease that works by effecting blood cells. It turns out that heterozygotes (HbA/HbS) have a natural immunity to malaria. So here, genetic variation gives evolution a chance to "defeat" the malaria disease by favoring heterozygotes. If no variation existed in the gene that codes for hemoglobin, such adaptation would be impossible.
Wiki User
∙ 15y ago
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How can a wide range of phenotypes increase the chance that some individuals will survive in a changing environment?
by natural selection.
Which action would increase the amount of carbon in the environment?
Burning fossil fuels like coal, oil, and natural gas increase the amount of carbon in the environment.
Thermal energy added to a substance that is not changing state causes the substances temperature to do what?
To increase.
Which particles in an atom can increase or decrease in number without changing the identity of the element?
Neutrons
How would changing the amount of glucose available to a cell affect the rate of respiration?
Glucose utilization would increase a little
How can a wide range of phenotypes increase the chance that some individuals will survive in a changing environment?
by natural selection.
When stabilizing selection acts to eliminate extremes at both ends of a range of phenotypes the frequencies of the intermediate phenotypes increase or decrease?
Increase, of course.
Changing trends in retail environment?
because of the changing lifestyle of the Indian people,their psychology about shopping and the increase in the disposable income
When stabilizing selection acts to elimination extremes at both ends of a range of phenotypes the frequencies of the intermediate phenotypes increase?
That is the definition of stabilizing selection.
Is it true When stabilizing selection acts to eliminate extremes at both ends of a range of phenotypes the frequencies of the intermediate phenotypes increase?
A well stated definition of what stabilizing selection is, so true.
How could a farmer increase the number of genotypes and phenotypes present in his next apple crop?
Cross plants that have very different characteristics
Carbon Dioxide Would Increase In The Environment If?
Carbon Dioxide would increase in the environment if the rain forests are demolished.
Rocks can melt without changing temperature when the pressure exerted on them is .?
Increase
Will changing from single exhaust to duel exhaust increase mileage?
no
When you increase the pace in your walk you are changing the?
You change the intensity.
Which action would increase the amount of carbon in the environment?
Burning fossil fuels like coal, oil, and natural gas increase the amount of carbon in the environment.
Does a radioactive environment increase the blood pressure in a person?
no
