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yes they do. that is because when the sperm fuses with he egg, there are millions af sperm and it is highly highly unlikely that the same sperm containing the same genetic information will fuse with the same egg each time. different sperms have different genetic material in them. same with the eggs. thus their probabilities are way too low that it is impossible that one offspring looks like the other therefore leading to genetic variation. hope that helps
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoIn the human life cycle, the nucleus of a haploid sperm cell from the father joins with the nucleus of a haploid egg cell from the mother. The fusion of nuclei along with the cytoplasm from gametes is called fertilization. The result is a zygote.. It has two homologous chromosomes with genetic information from each parent.
Wiki User
∙ 11y agoFertilization is the moment in sexual reproduction when the sperm and ovum/egg unite. This produces genetic variation because the resulting organism has a mix of the genetic material of the parents (half from each parent).
Wiki User
∙ 11y agoIt occurs when an organism represents possible chromosome combinations. In humans, this is 1 of 8.4 million possible chromosome combinations.
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∙ 11y agofusion of sperm and ovum, each having a unigue combination of chromosomes, introduces further variation
Wiki User
∙ 11y agoFusion of sperm and ovum, each having a unique combination of chromosomes, introduces further variation.
Wiki User
∙ 15y agoYes
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How does variation lead to evolition?
Variation is caused by new genetic mutations in a population which lead to different traits in a population. Evolution selets the most useful of these mutation, eventually leading to prominence of new traits within a species or population, or even new species.
What where the 3 steps that lead to the formation to new species according to the theory of natural selection?
Generally and simply, mutation, genetic variation and natural selection.
How does sexual reproduction lead to genetic variation in humans?
At prophase I in meiosis the process of independent orientation of chromosomes takes place. Simplified example; one way or the other of the two ways this process take place. XX YY or XY YX Then in this same phase their is crossing over where the male and female chromosomes exchange parts of their chromosomes with each other. Finally, with all these variations of gametes, there is random fertilization where any two male and female gametes join together to form a zygote.
What process during meiosis causes genetic recombination?
Recombination may be caused by loci on different chromosomes that sort independently or by a physical crossing over between two loci on the same chromosome, with breakage and exchange of strands of homologous chromosomes paired in meiotic prophase I.
Mutations are important for evolution because they .?
Mutations are very important for evolution today because they usually lead to the genetic changes in a given gene pool. They also allow the species to change with the environment.
What leads to genetic variation in a population?
Random mutations in an organism's DNA after reproduction.what lead to variations
Mutations are a source of what in a species?
Genetic variation, which can lead to evoloution, and then potentially a new species.
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 can genetic drift lead to changes in relative frequencies of alleles?
Genetic drift is the spread of specific random variations throughout the gene pool in the absence of specific selection pressures. There's always random variation in the population, but there aren't always changes in the environment for the population to adapt to. So natural selection, in stead of moving the population towards adaptation, might select from that random variation to move 'sideways', as it were, to a state that's equally well-adapted to the environment as what came before, but different. As random variation may produce many variants that are, more or less, equally well-adapted to their environment, the direction of evolution that results is more or less random.
Does cossing over lead to genetic variation?
Crossing over: exchange of parts of DNA in a homologous chromosome in the area where they come in contact with each other. Then this chromosome splits, during meiosis, to form a daughter cell (gamete) with a haploid number of chromosomes. During fertilization, the two gametes fuse into one cell containing now a diploid number of chromosomes. This process leads to genetic diversity and variation.
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.
Which environmental factor would likely lead to an increase in genetic variation in population of squirrels?
fukk e2020
How does genetic variation and mutations relate to each other?
mutation brings about variation which is the basis of evolution and the two types of variation are heritable and non-heritable
Which sequence if natural events is likely to lead to ecosystem stability?
1) Sexual Reproduction - Genetic variation - Biodiversity - Ecosystem Stability
How does variation lead to evolition?
Variation is caused by new genetic mutations in a population which lead to different traits in a population. Evolution selets the most useful of these mutation, eventually leading to prominence of new traits within a species or population, or even new species.
How is genetic variation related to species chances of becoming extinct?
Little or no variation could lead to failure to adapt to changing conditions. Too much variation would prevent the species from passing on beneficial traits because they would change too rapidly.
How is genetic variation related to a species's chances of becoming extinct?
Little or no variation could lead to failure to adapt to changing conditions. Too much variation would prevent the species from passing on beneficial traits because they would change too rapidly.
