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Variation or mutation occurs within the DNA. It is a natural result of the replication process, or the copying of one DNA strand to make new DNA during reproduction. If the new mutation ends up making some kind of variation that does not kill the organism, then the variation will be passed on to new generations. This is how new traits are formed. When the variation is actually more useful than a trait that the organism's parents had, that new variation will be passed along as a survival trait.
Meiosis. Mitosis is asexual. Meiosis creates genetic recombination through sexual reproduction. This provides different genes (chromosomes) to be combined and create different organisms. Mitosis makes the offspring the exact same as the parent because the same set of genes (chromosomes) are used in the creation of the cell.
Crossing over: mixing maternal and paternal genes.
Random segregation assortment (Metaphase 1)
Independent assortment.
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Genetic variation is a necessary condition of which process?
Genetic variation is one of the conditions required for Natural Selection to occur.
What is variation in evolution?
A variation of a gene is called and allele. Different alleles are caused by mutations.
What is genetic variation measured with?
Variation of quantative characters such as littersize and lifetime reproductive output. Variation in protein sequence. Variation in the non-coding regions of DNA
What increases genetic variations?
A large population increases genetics variation. Mutation will also increase genetics variation.
What tends to increase genetic variation in a population?
Genetic variation is the total amount of genetic diversity present within a species or population. The amount of genetic variation in a population will depend on a variety of factors, including the size of the population, the type of reproduction, and environmental influences. The primary way to increase genetic variation in a population is through mutation. Mutations are random changes in the genetic code that can lead to new traits or characteristics. Mutations can be caused by environmental factors, such as exposure to radiation or chemicals, or they can occur spontaneously. Mutations can be beneficial, neutral, or detrimental to the organism, but they do lead to increased genetic variation. Another way to increase genetic variation in a population is through migration. When individuals from different populations mate, they bring with them different alleles from their home population, increasing the genetic diversity of the new population. This is especially important for populations that are geographically isolated, such as island populations. Another factor that can increase genetic variation is sexual selection. This is the process by which individuals select mates based on certain desired traits. This can lead to an increase in the number of different alleles in the population, as individuals with certain traits will be more likely to reproduce. Finally, gene flow is a process that can increase genetic variation in a population. Gene flow is when individuals from one population move to another population and mate with individuals in the new population. This can bring in alleles from the original population, increasing the genetic diversity of the new population. Overall, while mutation, migration, sexual selection, and gene flow are all important factors in increasing genetic variation in a population, it is important to note that genetic variation can also be decreased by inbreeding and genetic drift. Inbreeding is when individuals mate with close relatives, reducing the number of alleles in the population and leading to decreased genetic variation. Genetic drift is when random fluctuations in allele frequencies occur due to a small population size, leading to decreased genetic variation. Therefore, it is important to consider all of these factors when trying to increase genetic variation in a population.
How and why variation occur in rate and sequence of development and learning?
how and why variation occur in the rate and sequence ot develpment and learning
How is variation related to?
The more variation there is in a group of specimens, the more evolution can occur between them.
Why is there variation?
the change that occur from parents in the offspring
How is variation related to evolution?
The more variation there is in a group of specimens, the more evolution can occur between them.
Why must a population have a genetic variation in order for natural selection to occur?
Without variation there is nothing to select from.
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
Genetic variation is a necessary condition of which process?
Genetic variation is one of the conditions required for Natural Selection to occur.
Which of these is necessary for natural selection to occur genetic engeneering genetic variation asexual reproduction or enviormental stability?
Genetic variation is necessary for natural selection to occur. This variation provides the raw material for differential survival and reproduction, which drives the process of natural selection. Without genetic variation, there would be no differences for natural selection to act upon.
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
What characteristic within populations causes natural to occur?
genetic variation
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
The degree of adaptation that can occur in a population is limited by?
the amount and kind of genetic variation in a population
