If only the dominant trait appears in Mendel's first generation, what is the correct conclusion about the recessive trait?
Answer and explanation
Correct answer: It may be hidden rather than absent.
Mendel’s principle of dominance explains why a dominant phenotype can mask a recessive one in the first filial generation. For example, an F1 plant with genotype Tt shows the dominant tall form, while the recessive allele t is still present in its genetic makeup. When alleles separate during gamete formation and combine again, the recessive phenotype can reappear in F2. Thus option A is correct; invisibility does not mean destruction or absence.
Frequently asked questions
What is the correct answer to this question?
It may be hidden rather than absent.
Why is this the correct answer?
Mendel’s principle of dominance explains why a dominant phenotype can mask a recessive one in the first filial generation. For example, an F1 plant with genotype Tt shows the dominant tall form, while the recessive allele t is still present in its genetic makeup. When alleles separate during gamete formation and combine again, the recessive phenotype can reappear in F2. Thus option A is correct; invisibility does not mean destruction or absence.
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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