What is shown when a recessive trait reappears in the second generation?
Answer and explanation
Correct answer: The trait was hidden in the first generation, not destroyed
The governing concept is Mendelian inheritance. A recessive allele can be present in an organism without being expressed when a dominant allele is also present. During gamete formation and fertilisation, two recessive alleles may come together in the second generation, making the trait visible again. Thus, its reappearance proves that the trait was inherited and concealed, not destroyed. Options B, C and D contradict heredity principles.
Frequently asked questions
What is the correct answer to this question?
The trait was hidden in the first generation, not destroyed
Why is this the correct answer?
The governing concept is Mendelian inheritance. A recessive allele can be present in an organism without being expressed when a dominant allele is also present. During gamete formation and fertilisation, two recessive alleles may come together in the second generation, making the trait visible again. Thus, its reappearance proves that the trait was inherited and concealed, not destroyed. Options B, C and D contradict heredity principles.
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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