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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.
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.
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.
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.
Which organism would most likely have new gene combinations?
A hamster resulting from sexual reproduction
Offspring that result from meiosis and fertilization each have?
gene combinations different from those of either parent
Where does the crossing over during Snyapsis take place?
it takes place between homologous chromosomes and results in new gene combinations
Offspring that result from reproduction can always maintain a parent's gene combinations?
edoptions. Novelstars answer is Asexual. Asexual reproduction bears offspring that always maintain a parent's gene combinations..
Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by?
crossing over of homologous chromosomes during meiosis
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.
Are mutations the only way to add new genes to a gene pool?
yes. independent assortment and crossing over in mitosis will add new combinations of alleles to the DNA but only mutations will create new genes.
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
What is a diagram that shows all possible gene combinations far across?
cell genders
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
