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Zorluk: KolayHuman Morphological and Physiological Variations

The ability of an individual to roll the tongue is a physiological trait that exhibits discontinuous variation in human populations.

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The statement is True because tongue rolling is a physiological trait that divides humans into distinct categories without intermediate types.
Tongue rolling is governed by genetic inheritance and results in distinct, non-overlapping phenotypic groups (rollers and non-rollers). Because it reflects functional capability rather than external body measurements, it is correctly classified as a discontinuous physiological variation.

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1
Classify the trait type (morphological vs. physiological).
Tongue rolling relates to muscle function and movement capability, making it a physiological trait.
Physiological variation relates to anatomical functioning and biochemical processes rather than general bodily measurements.
2
Determine the distribution type (continuous vs. discontinuous).
Humans are either tongue rollers or non-rollers without intermediate states, confirming a discontinuous pattern.
Discontinuous variation features distinct, clear-cut categories influenced mainly by genetics and unaffected by environment.

Anahtar Kavram

Discontinuous Physiological Variation in Humans
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Konular

Human Morphological and Physiological Variations

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