Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
What are factors which causes two hybrid populations not to change?
- Reinforcement
- Fusion
- Stability
Hybrids are the offspring of parents that have genetically defined qualities that differ from one another. Different species, genera, or (rarely) families may be the parents. As a result, the term hybrid has a broader meaning than mongrel or crossbreed, which typically refers to animals or plants that are the result of a cross between two races, breeds, strains, or varieties of the same species. Many species hybrids can be found in nature (in ducks, oaks, blackberries, and so on), and while naturally occurring hybrids between two genera have been documented, the majority of these latter hybrids are the consequence of the human intervention.
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