Which example shows an acquired trait?
Answer and explanation
Correct answer: Darkening of skin in sunlight
The governing concept is the difference between inherited and acquired traits. Darkening of skin after exposure to sunlight develops during an individual’s lifetime because of an environmental influence, so it is an acquired change. Blood group and genetically controlled eye colour are inherited characteristics, while chromosome number is a genetic feature rather than a lifetime-acquired trait. Sun tanning normally does not alter reproductive-cell DNA in a heritable way.
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What is the correct answer to this question?
Darkening of skin in sunlight
Why is this the correct answer?
The governing concept is the difference between inherited and acquired traits. Darkening of skin after exposure to sunlight develops during an individual’s lifetime because of an environmental influence, so it is an acquired change. Blood group and genetically controlled eye colour are inherited characteristics, while chromosome number is a genetic feature rather than a lifetime-acquired trait. Sun tanning normally does not alter reproductive-cell DNA in a heritable way.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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