If a plant has one dominant and one recessive form for height, why will it appear tall?
Answer and explanation
Correct answer: The dominant form masks the recessive form externally
The governing concept is a heterozygous genotype and phenotypic dominance. A plant with one dominant allele and one recessive allele has both forms in its genetic makeup, but the dominant allele controls the observable height under the usual Mendelian model. The recessive allele remains present but is not expressed in the phenotype. Therefore option A is correct; it does not mean the recessive allele has been destroyed.
Frequently asked questions
What is the correct answer to this question?
The dominant form masks the recessive form externally
Why is this the correct answer?
The governing concept is a heterozygous genotype and phenotypic dominance. A plant with one dominant allele and one recessive allele has both forms in its genetic makeup, but the dominant allele controls the observable height under the usual Mendelian model. The recessive allele remains present but is not expressed in the phenotype. Therefore option A is correct; it does not mean the recessive allele has been destroyed.
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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