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Why is gene duplication seen as potentially event in evolution of species?
Yes. When a gene is duplicated you have one gene doing the job it was doing before and the possibility of the duplicated gene having a beneficial mutation and picking up a brand new job to do and making a newly beneficial protein. Of course if the mutation is deleterious that organism will not pass those genes on any further than progeny. Remember, only germline mutation are passed on to future generations.
Why genetic diversity decrease in founder effect?
Founder's effect is a type of genetic drift, a chance event that can disrupt the gene pool of a population. In this case, the gene pool is limited due to the similarity of genes shared within the group. These similarities are the result of a limited number of "founders" or individuals who started the population. A good example of founder's effect is the Amish population. A few individuals started the group and limited immigration and reproduction, which would have allowed for new combinations of genes to be added to the gene pool. Because of this lack of variation, the members of the population share many traits, thus resulting in decreased diversity.
Who was the first scientist generally accredited with putting the study of chemistry on a firm experimental basis?
John Dalton because Dalton predicted new combinations of elements; these new combinations were found providing evidence that Dalton's theory worked.
Do variations in populations lead to new species?
Variations in offspring are acted upon by natural selection: some offspring will be slightly more proficient at producing new offspring than others. This means that some alleles will promulgate throughout the population gene pool at a faster rate than others, resulting in a shifting frequency of incidence in the population gene pool. This is what evolution is: shifting allele frequencies in the population gene pool.
How does gene flow change allele frequencies?
Gene flow within a population distributes mutations among the individuals. Immigration and emigration transport alleles into and out of a population's gene pool, thus affecting the result of natural selection.
How does sexual reproduction result in a larger variety of possible gene combinations?
Basically, in three ways. Independent orientation of the chromosomes in meiosis. Crossing over in chromosomes in meiosis. Random fertilization; the random mathching of any sperm/egg combination in fertilization.
Are mutations the only way to add new genes to a gene pool?
No, mutations are not the only way to add new genes to a gene pool. Gene flow, which involves the movement of genes between populations, can also introduce new genetic variation. Additionally, genetic recombination during sexual reproduction can shuffle existing genes to create new combinations.
Where does the crossing over during Snyapsis take place?
it takes place between homologous chromosomes and results in new gene combinations
Which organism would most likely have new gene combinations?
Organisms that reproduce sexually, like humans or plants, are more likely to have new gene combinations because of the shuffling and recombination of genes that occurs during meiosis and fertilization. This results in offspring with unique genetic compositions different from their parents.
Why variation is important?
Variation is important because it produces species with different gene combinations which result in the new offspring to become more immune to other dieseases.
Is a tool that can used to predict the gene combinations in a cross of parents?
Punnett square
What combinations of genes could tall pea plants have?
two tall genes or one tall gene and one short gene
Offspring that result from reproduction can always maintain a parent's gene combinations?
Offspring inherit a combination of genes from both parents, but this doesn't necessarily mean they maintain the exact gene combinations of either parent. Genetic recombination and independent assortment during meiosis result in unique combinations of genes in offspring. These genetic variations contribute to the diversity within a species.
Does sexual reproduction create new alleles or new combinations of alleles?
new combinations of alleles
Which does sexual reproduction create new allels or new combinations of alleles?
new combinations of alleles
What is the number of different genetic combinations available in a given gene pool?
The number of different genetic combinations in a gene pool can be calculated using the principles of genetics, particularly considering factors like independent assortment and recombination during meiosis. For diploid organisms, if there are 'n' pairs of chromosomes, the total combinations can be estimated as 2^n due to independent assortment. Additionally, mutations and genetic diversity can further increase the potential combinations. Therefore, the actual number of genetic combinations in a gene pool is vast and influenced by the organism's reproductive strategies and environmental factors.
What makes new gene enter a population?
New genes can enter a population through several mechanisms, the most notable being mutation, gene flow, and genetic recombination. Mutations introduce new alleles, while gene flow occurs when individuals migrate between populations, bringing new genetic material. Additionally, genetic recombination during sexual reproduction can create new gene combinations, contributing to genetic diversity. These processes collectively enhance the genetic variation within a population, allowing for adaptation and evolution over time.
