Genetic variation, which can lead to evoloution, and then potentially a new species.
If a population dwindles, there is low genetic variation and a species may risk extinction.
Anaphase 1 - the crossing over of chromosomes, they swap genetic material determining what you genetically inherit
immigration, mutation and sexual reproduction.
If the human population was reduced to a very small number of interbreeding individual then this small population, denied outbreeding, would have very little genetic variation. Humans, who went through a bottleneck event about 70,000 years ago, are considered a " small " species because they have little genetic variation in comparison to many other species. Google cheetah to see how this concept works.
Genetic variation, which can lead to evoloution, and then potentially a new species.
Variation within species can be caused by genetic mutations, environmental factors, and interactions between genes and the environment. Genetic mutations are changes in the DNA sequence that can create new traits. Environmental factors, such as diet and climate, can also influence variation by selecting for certain traits over others.
Gentic variation is mearsured by the number of species in the given area not.
If a population dwindles, there is low genetic variation and a species may risk extinction.
A lack of genetic variation can make a species less able to adapt to changing environmental conditions or new threats like diseases or predators. This reduced ability to adapt increases the species' vulnerability to extinction if they cannot effectively respond to these challenges.
They both decrease genetic variation. Stabilizing selection and disruptive selection reduce genetic variation
As each new generation is produced, genetic variation may be introduced into a population. The more genetic variation in a population, the more likely it is that some individuals might have traits that will be advantageous if the environment changes.
Sexual Reproduction Genetic mutation
Meosis creates gametes (reproductive cells) and allows genetic variation of the species
Genetic mutations are the major cause of variation within species. Mutations can introduce new genetic traits that can be passed on to offspring, leading to diversity within a population. Other factors like genetic recombination, migration, and environmental influences can also contribute to variation within species.
Crossing over causes genetic diversity. If there was no genetic diversity in a species, the species would be prone to extinction.
Crossing over causes genetic diversity. If there was no genetic diversity in a species, the species would be prone to extinction.