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because other wise everything would be the same. and other wise is everyone had the same genetics, itd be like inbreeding and because of the genetics being the same itd cause problems and cells tend to mutate.. soo, that's basically why, to keep things different and not miutated ahha
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Why is crossing over so important?
It increases genetic variation in organisms
What are three ways to get genetic variation?
Independent assortment of chromosomes, crossing over and Random fetiliztion
What causes diversity of organisms?
the genetic variation isappearanceor the genes members of the same species of the same group.
What is the ultimate source of genetic variation and the basis for the diversity of life on earth?
Mutations. These have quite a few different causes. Sexual reproduction is a "more recent source" {beginning 600 million years ago} of genetic variability. The process of sharing genetic information, coupled with the random crossing and mixing of genetic information during the creation of a new organism, leads to another source of genetic variability.
Meiosis and fertilization are important processes because they may most immediately result in?
genetic variation
What is the ultimate source of genetic variation and the basis for the diversity of on earth?
mutation
What does neutral variation mean?
Genetic diversity that confers no apparent selective advantage.
Why is crossing over so important?
It increases genetic variation in organisms
What is the ultimate source of genetic variation and the bases for the diversity of life on earth?
mutation
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
What are three ways to get genetic variation?
Independent assortment of chromosomes, crossing over and Random fetiliztion
How do genetic mutations influence biological diversity?
In most cases mutations increase genetic variation, but only if they propagate to later generations.
What causes diversity of organisms?
the genetic variation isappearanceor the genes members of the same species of the same group.
How does genetic combination help a species to survive?
It causes diversity and variation amongst a population
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.
Do Organisms produced as a result of binary fission exhibit a great deal of genetic variation?
No. Binary fission is cloning and the genetic diversity that results from this is nil. Excepting the occasional copying errors we cal mutations, but nowhere near the genetic diversity given by sexual reproduction and genetic recombination.
How is genetic variation important to natural selection and adaptation?
identical
