Multiple choice

Which of the following is not a variant in humans?

  1. Shape of hair

  2. Number of forelimbs

  3. Attached ear lobes

  4. Rolling of tongue
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The number of forelimbs (arms) in humans is not a variant - all normal humans have exactly two forelimbs. The other options are genuine variations: hair shape (curly/straight), ear lobe attachment (attached/free), and tongue rolling ability (able/unable) are all classic examples of inherited human variations that Mendelian genetics helps explain. These traits vary between individuals while forelimb number is constant.

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