In Mendelian inheritance why does dominant trait not necessarily mean that it is always more useful?
Answer and explanation
Correct answer: Dominance is related to expression, not usefulness
The governing concept is the distinction between genetic dominance and biological advantage. A dominant allele is expressed in the phenotype when present in one copy, whereas a recessive allele may require two copies. Dominance describes expression, not whether a trait improves survival or reproduction. Usefulness depends on the environment and selection. Therefore option A is correct; dominance is not itself natural selection, and recessive traits can appear in suitable genotypes.
Frequently asked questions
What is the correct answer to this question?
Dominance is related to expression, not usefulness
Why is this the correct answer?
The governing concept is the distinction between genetic dominance and biological advantage. A dominant allele is expressed in the phenotype when present in one copy, whereas a recessive allele may require two copies. Dominance describes expression, not whether a trait improves survival or reproduction. Usefulness depends on the environment and selection. Therefore option A is correct; dominance is not itself natural selection, and recessive traits can appear in suitable genotypes.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Our Environment. Topic: Food chain and food web.
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