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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.

Related tags

Dominant-TraitMendelMonohybrid-CrossHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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