0
If two populations have been reproductively isolated and can no longer breed and produce fertile offspring the process of what has occurred?
Wiki User
∙ 6y ago
If two populations of the same species no longer interbreed then their differences will start to become more pronounced and eventually they will become so different that they will be classified as two different sub-species.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Why does geographic isolation cause separation?
geographic isolation is when a physical barrier divides a population and they can no longer reproduce, reproductive isolation is when a species can no longer reproduce offspring. hope this helps!
Process by which two or more species change in response to each other?
The phrase "one species evolving into another" has an unfortunate rate of incidence. It presupposes that there is some "box A" and a "box B", and that lifeforms at some point evolve out of "box A" and into "box B". In reality, there are no boxes. There are just labels that we humans attach to the different shapes we see in life. The way that evolution describes speciation is in terms of continued divergence between populations at the genetic, morphological and behavioural level, occasionally resulting in a significant decline in interbreeding between these populations, after which the reproductively separated populations continue to diverge. When this happens, we say that speciation has occurred, and attach new species-labels to one or both of the resulting populations. Considering this, it would be more appropriate to use the population as a basic unit of evolution than the species.
What are minor genetics between parents and offspring?
The offspring of parents have half of the parents genes (as you already know) but the mixture will produce a totally unique individual. Some of the genes will be exactly the same between all of them such as blood type or eye color. Sometimes a mutation may have occurred which will produce a completely different expression of the genes.
When micro-evolution occurs over many generations as inherited characteristics leads to changes in populations what has occurred?
Macro-evolution. Or, more accurately, speciation.
Charles Darwin's thoughts on evolution would correspond to punctuated equilibrium?
Punctuated Equilibria is a theory proposed by Stephen Jay Gould and Niles Eldredge to explain patterns of speciation in the fossil record. They pointed out that the record seems to show most species undergo long periods of relatively little change (stasis), then undergo rapid bursts of change at irregular (punctuated) intervals. Evolution did not seem to proceed at a stately, constant, slow speed. Gould and Eldredge explained this by taking the standard idea of how species form (allopatric speciation, or speciation in small isolated groups at the periphery of populations) and showing that this process would produce exactly the pattern which is observed in the fossil record. Essentially, evolution and speciation can occur rapidly in small isolated populations, sometimes too quickly for the fossil record to track all of the intermediate forms. The result is what looks like abrupt emergence of forms with little or no transitional stages, when in reality the evolution had occurred through intermediate stages, only too quickly for the slow process of fossilization to capture it.
What type of speciation occurred when a plant population becomes reproductively isolated while living with its parent population?
Sympatric Speciation
What is the difference between divergence and speciation?
Divergent speciation refers to the rise of a new species when organisms that can interbreed and reproduce fertile offspring get separated. Separation can be due to geographical barriers like mountains and lakes.
When microevolution occurs over many generations as inherited characteristics to changes in populations what has occurred?
descent with modification
What are 3 events that can lead up to speciation?
Isolation often leads to speciation, because as each isolated population evolves new characteristics, the separate populations eventually get DNA that is too different for the two to breed and have fertile offspring (this is the point when speciation has occurred). In the case that there is not isolation, the whole species must slowly evolve until it becomes a new species. However, here the line between where the speciation actually occurred becomes blurry, because it doesn't happen in a single generation.
Does speciation form new species?
The term 'speciation' does indeed refer to the 'formation' of new species. 'Formation' is probably better replaced with 'divergence' as in 'the divergence of two species from one'. A common ancestor of two species may have two of its populations isolated, so the two populations cannot interbreed. Genetic differences (via mutation) should build up in the two populations over time or indeed, simply the mixing of genes via meiosis within the two populations could follow different routes. The non-mixing of the two populations would ensure the non-homogenisation of the gene pool, ensuring a homogenisation of the morphology of the species back to the morphology of the common ancestor. Eventually, so much genetic difference should build up between the two populations that, be they removed from isolation or not, the two populations would no longer be able to interbreed and produce fertile offspring. Remove the ability of interbreeding and, within the Biological Species Concept, the two populations would have diverged into two separated species. Speciation would have occurred.
When microevolution occurs over many generations as inherited characteristics lead changes in populations what has occurred?
Descent with modification
The murder of entire populations genocide that occurred during Hitler's rule of Germany is called?
The murder of entire populations (genocide) that occurred during Hitler's rule of Germany is called the Holocaust; six million Jews were persecuted and murdered by Hitler and his Nazi regime as were five million Non-Jews.
Which statement accurately reflects population changes that occurred as a result of the age of exploration?
most latin american populations became culturally diverse
What mechanisms of evolution appear to cause speciation?
Only natural selection appears to cause the adaptive change that can lead to speciation.Answer 2There are various different sets of circumstances that could lead to speciation. This is one example: consider two populations of the same species that are permanently separated from one another through some geographical happenstance. Both populations will experience genetic drift. And since genetic drift is (limited by natural selection, but still) essentially random, these populations will start to diverge - first genetically, and eventually behaviourally and anatomically. If enough time passes, these populations may have become so different from one another that even if they were put back together again, they would not (be able to) produce fertile offspring between them. At this point, speciation has occurred.
What are some events that occurred in the 1980's?
In 1981, the first diagnosis of AIDS was made, and the HIV virus was isolated later in the decade. The Berlin Wall came down in 1989.
How does a mutation in a cell affect an organism?
A mutation in a sex cell means that the mutation can be passed on to the individuals offspring. If the mutation just occurred in a somatic cell, it would not be passed down.
What major change in the US occurred between the Civil War and the 1920s?
City populations grew rapidly as both immigrants and native-born citizens looked for higher paying jobs.
