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genetic variation happens because of meiosis. chromosomes are randomly in each sperm/egg cell, and so when they come together it's unlikely to get the same combination twice
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Mutations are a source of what in a species?
Genetic variation, which can lead to evoloution, and then potentially a new species.
Which procedure can not be used to increase genetic variation?
If a population dwindles, there is low genetic variation and a species may risk extinction.
What are the possible causes of genetic variation?
Anaphase 1 - the crossing over of chromosomes, they swap genetic material determining what you genetically inherit
A change in the genetic material that produces variation in a species may be the result of?
immigration, mutation and sexual reproduction.
Which would most likely decrease the genetic variation in the human population?
If the human population was reduced to a very small number of interbreeding individual then this small population, denied outbreeding, would have very little genetic variation. Humans, who went through a bottleneck event about 70,000 years ago, are considered a " small " species because they have little genetic variation in comparison to many other species. Google cheetah to see how this concept works.
How does genetic combination help a species to survive?
It causes diversity and variation amongst a population
What causes variation within species?
Variation within species can be caused by genetic mutations, environmental factors, and interactions between genes and the environment. Genetic mutations are changes in the DNA sequence that can create new traits. Environmental factors, such as diet and climate, can also influence variation by selecting for certain traits over others.
What causes diversity of organisms?
the genetic variation isappearanceor the genes members of the same species of the same group.
Mutations are a source of what in a species?
Genetic variation, which can lead to evoloution, and then potentially a new species.
If a certain species has little genetic variation what could lead to its rapid extinction?
Genetic bottleneck causes very little genetic variation and can cause genetic drift.
How does genetic variation prevent extinction of a species?
The genetic variation enable a particular species to withstand the adversities of Nature by way of selection on the basis of the principle of survival of the fittest.
How genetic variation is measured?
Gentic variation is mearsured by the number of species in the given area not.
Which procedure can not be used to increase genetic variation?
If a population dwindles, there is low genetic variation and a species may risk extinction.
Why is sexual reproduction preferable to a species?
It promotes genetic variation.
What do stabilization selection and disruptive selection have in common?
They both decrease genetic variation. Stabilizing selection and disruptive selection reduce genetic variation
What would decrease genetic variation in a population?
When there is low genetic variation in a population the species produced are unlikely to withstand diseases.
How does variation in a species help the species survive?
As each new generation is produced, genetic variation may be introduced into a population. The more genetic variation in a population, the more likely it is that some individuals might have traits that will be advantageous if the environment changes.
