If a plant has one dominant and one recessive form for a trait, what will usually be seen externally?
Answer and explanation
Correct answer: The dominant trait will appear
The governing concept is complete dominance. A plant with one dominant allele and one recessive allele is heterozygous, for example Tt. The dominant allele determines the phenotype, so the plant generally appears tall if T represents tallness, even though the recessive allele is still present and can be passed to offspring. Hence option A is correct. The recessive phenotype requires two recessive alleles, and heterozygosity does not prevent reproduction.
Frequently asked questions
What is the correct answer to this question?
The dominant trait will appear
Why is this the correct answer?
The governing concept is complete dominance. A plant with one dominant allele and one recessive allele is heterozygous, for example Tt. The dominant allele determines the phenotype, so the plant generally appears tall if T represents tallness, even though the recessive allele is still present and can be passed to offspring. Hence option A is correct. The recessive phenotype requires two recessive alleles, and heterozygosity does not prevent reproduction.
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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