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What is the process by which members of isolated populations become so different in genetic makeup that they cannot produce life?
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What is biodiversity and explain its kind?
Basically biodiversity is the level of genetic difference among different members and populations of a species. This is important as too much genetic similarity can lead to inbreeding and illness.
When are two species to be reproductively isolated?
When the members of two populations cannot interbreed and produce fertile offspring.
List and describe the different types of genetic isolation?
geographic isolation- the physical separation of members of a population reproductive isolation- the inability of members of a population to successfully interbreed with members of another population of the same or related species information from MODERN BIOLOGY by HOLT, Rinehart and Winston
Why do members of chromosome pairs separate during mitosis?
This process results in "Genetic Diversity". [Short Answer]
What does the term polygenetic refer to?
Polygenetic refers to a species which received its genes/genetic information from several distinct sources. It can similarly be used to describe a taxon (such as a phylum) whose members come from different ancestral sources.
How does roproductive isolation relate to evolution?
If two sub-populations of a species become reproductively isolated, it means that adaptation or genetic drift can make the two populations diverge genetically. If, as a result of this divergence, upon reintroduction, members of the two sub-populations no longer reproduce successfully, the two sub-populations have become different species.
What is biodiversity and explain its kind?
Basically biodiversity is the level of genetic difference among different members and populations of a species. This is important as too much genetic similarity can lead to inbreeding and illness.
When are two species to be reproductively isolated?
When the members of two populations cannot interbreed and produce fertile offspring.
How can the isolation lead to the formation of new species?
Once a group becomes isolated, members of the isolated group mutate to adapt to their new environment. For birds, this may mean new colors, food preferences and so on, which make it entirely different from the original. Once a group becomes isolated, members of the isolated group can no longer mate with the rest of the species.
What populations is likely to have the most genetic variation among its members?
the studyidland answer is (a large population that has existed for a long period of time) fatboi
How do populations vary as a result of their geography?
there are many geographical isolation which makes one population to not able to meet its species member on the other side like some of the animals which are not able to swim can not cross sea or river and get isolated from other members of same species and the by the long time they get very much different in physiological and behaviour that they start count in different species
How can populations change in size?
the populations can change in size because there could be more of the offspring.
Is it true that when some members of a species become isolated they are less likely to form a new species?
Isolation is often the precursor to the generation of a new species or subspecies. Small populations of isolated individuals can go through genetic drift, a condition where a considerable change in the phenotype/genotype of the population occurs in one or two generations. Prolonged isolation could yield substantial change if environmental pressures are different in the isolated region compared to the larger population from which it separated.Snow Leopards are an example of changes in coat thickness, coat color, tail length and fat storage which are adaptations to an alpine environment. Whether the progenitors of the Snow Leopard were isolated from the main population during glaciation, marginalized individuals that migrated where they could fill an unoccupied niche, out competed the previous niche holder or some combinationof these possibilities the result is the Snow Leopard.
Populations of a species that now differ genetically because they have adapted to different living conditions have undergone?
Speciation if members from different groups can no longer produce fertile off-spring.
All the populations of a particular kind of organism are members of the same what?
Species
What is the role of genetic testing in spinocerebellar ataxia?
Genetic testing of at-risk family members can be performed when an affected individual has a known genetic mutation. Testing of high-risk family members without symptoms raises many issues.
One consequence of genetic drift is?
Genetic drift usually only has effect on the genetic diversity of small populations of a species. Often times, genetic drift can greatly reduce the diversity of a population if a significant percent of members of the population leave by a chance event (as opposed to natural selection.) This means that their alleles for various genes leave with them. Genetic drift does not always effect genetic diversity. Most of the time, it is the allele frequency that is affected by genetic drift. For example, if there are 60 long-finned bass and 40 short-finned bass living in a pond, the gene frequency ratio is 3:2. If 25 short-finned are fished out, the allele frequency is now 4:1. If all or most of the members of a population carrying a specific gene were removed from the population because of genetic drift, that would effect the genetic diversity.
