continuous variation
Quick Summary
In genetics, continuous variation refers to variations where a series of intermediate types connects the extremes. This type of variation is also known as quantitative inheritance.1
Unlike discontinuous variation, which has distinct classes (like blood groups), continuous variation shows a smooth grading between two extremes. A prime example is human height, where most individuals fall within an average range, with fewer individuals at the very shortest or tallest ends.2
These traits are typically influenced by multiple genes, each with a small effect, and are also significantly affected by environmental factors. This makes them more complex to study and control in breeding programs compared to qualitative traits.3
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