If tallness appears in the first generation when a tall pea plant is crossed with a dwarf pea plant, what type of trait is tallness?
Answer and explanation
Correct answer: Dominant trait
The governing concept is Mendel’s principle of dominance. When contrasting pure traits are crossed, the trait expressed in the first filial generation masks the alternative trait. In the classic pea-plant example, allele T for tallness is dominant over allele t for dwarfness; the hybrid has genotype Tt and is tall. Therefore, tallness is the dominant trait, not an acquired, harmful, or recessive trait.
Frequently asked questions
What is the correct answer to this question?
Dominant trait
Why is this the correct answer?
The governing concept is Mendel’s principle of dominance. When contrasting pure traits are crossed, the trait expressed in the first filial generation masks the alternative trait. In the classic pea-plant example, allele T for tallness is dominant over allele t for dwarfness; the hybrid has genotype Tt and is tall. Therefore, tallness is the dominant trait, not an acquired, harmful, or recessive trait.
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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