Which of the following traits is not a morphological variation in humans?
Answer Details
The trait that is not a morphological variation in humans is the ability to taste PTC. PTC is a chemical substance that is either bitter or tasteless to people depending on their genetic makeup. While colour, fingerprints, and size are physical traits that can vary among individuals, the ability to taste PTC is not a visible or physical characteristic. Instead, it is determined by a person's genetic makeup, specifically a gene called TAS2R38. Therefore, the ability to taste PTC is not considered a morphological variation, but rather a genetic variation.