Class 10 Science Biology Heredity and Evolution



Which one of the following statements is incorrect?
(a)
Alleles are different forms of the same gene.
(b)
Alleles are present at the same locus.
(c)
Alleles code for different isoforms of a protein.
(d)
Alleles are non-heritable.
Correct answer: (d) 
Solution: Alleles are two alternative forms of the same gene. They are present at the same locus on a chromosome. These are heritable. In an offspring, one allele is inherited from father and the other one is inherited from mother. They code for different isoforms of a protein. They are either dominant or recessive. Dominant allele produces dominant phenotype and requires only one copy to express itself. Recessive allele requires two copies to express itself. 
Thus, the correct answer is option D.

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