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 the 4 themes of Mendel's work?
Gregor Johann Mendel is known as the father of genetics. He was the one to gave the postulates for the principle of inheritance which are known as the Mendel’s laws of inheritance. Mendel discovered that individual traits are inherited as discrete factors which in a hybrid retain their physical identity. These discrete factors were then known as genes. This term called gene was given by Danish botanist Wilhelm Johannsen. A gene is known as a unit of heredity.
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