How did Mendel's experiments challenge the idea of blending of traits?
Answer and explanation
Correct answer: A hidden trait appeared again in the second generation.
The blending theory suggested that parental traits would permanently mix, like two colours of paint, so a recessive trait should not reappear unchanged. In Mendel’s pea experiments, a trait absent in the first hybrid generation reappeared in the second generation, such as dwarfness after crossing tall plants. This showed that hereditary factors remain distinct and can separate into later offspring. Hence option A is correct.
Frequently asked questions
What is the correct answer to this question?
A hidden trait appeared again in the second generation.
Why is this the correct answer?
The blending theory suggested that parental traits would permanently mix, like two colours of paint, so a recessive trait should not reappear unchanged. In Mendel’s pea experiments, a trait absent in the first hybrid generation reappeared in the second generation, such as dwarfness after crossing tall plants. This showed that hereditary factors remain distinct and can separate into later offspring. Hence option A is correct.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Mendel’s laws.
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