In a cross between pure tall and pure dwarf plants, all first-generation plants appear tall. What does this prove?
Answer and explanation
Correct answer: The tall trait is dominant and the dwarf trait can remain hidden
The governing concept is dominance in a monohybrid cross. Represent pure tallness as TT and pure dwarfness as tt. Every first-generation offspring receives T from one parent and t from the other, producing Tt. Because T is dominant, all offspring appear tall even though the recessive t allele is present and can reappear in a later generation. Thus option A is correct.
Frequently asked questions
What is the correct answer to this question?
The tall trait is dominant and the dwarf trait can remain hidden
Why is this the correct answer?
The governing concept is dominance in a monohybrid cross. Represent pure tallness as TT and pure dwarfness as tt. Every first-generation offspring receives T from one parent and t from the other, producing Tt. Because T is dominant, all offspring appear tall even though the recessive t allele is present and can reappear in a later generation. Thus option A is correct.
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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