A phenotypic character with intermediate forms that can be graded from one extreme to the other is referred to as?
Variations can be:
Discontinuous or discrete is either/or and is often caused by the presence or absence of a small number if genes.
We can all either roll our tongue or not - there's nothing in between.
Others are Eye colour, handedness & lobed/lobeless ears.
Continuous or quantitative, smoothly grading between two extremes: Hand span, arm length & height.
There is an explanation video available below.
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