Incorrect statement is:

Biology Principles of Inheritance and Variation Skill Builder Single Correct MCQ

Published on: August 21, 2026

Sutton and Boveri noted that the behavior of chromosomes was parallel to the behaviour of genes.

Drosophila melanogaster could be grown on simple synthetic medium in the laboratory.

Mendelian disorders are mainly determined by alternation or mutation in the single gene.

Substitution of valine by glutamic acid at the sixth position of the beta globin chain of the haemoglobin molecule cause sickle-cell anaemia.

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The correct answer is:

The substitution of Glutamic acid (Glu) by Valine (Val) at the sixth position of the beta globin chain of the haemoglobin molecule caused sickle cell anemia.

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