Assertion (A) Down’s syndrome is a Mendelian disorder. Reason (R) It is caused due to the presence of an additional copy of chromosome 21.

Question

Assertion (A) Down’s syndrome is a Mendelian disorder. Reason (R) It is caused due to the presence of an additional copy of chromosome 21. (A) If both A and R are true and R is the correct explanation of A (B) If both A and R are true, but R is not the correct explanation of A (C) If A is true, but R is false (D) If A is false, but R is true

Tardigrade Admin · Accepted Answer

Assertion is false, but Reason is true. Assertion can be corrected as Down’s syndrome is a chromosomal disorder. It is caused due to the presence of an additional copy chromosome 21 (trisomy 21).

Q. Assertion (A) Down’s syndrome is a Mendelian disorder.
Reason (R) It is caused due to the presence of an additional copy of chromosome $21$ .

If both A and R are true and R is the correct explanation of A

If both A and R are true, but R is not the correct explanation of A

If A is true, but R is false

If A is false, but R is true

Assertion is false, but Reason is true. Assertion can be corrected as
Down’s syndrome is a chromosomal disorder. It is caused due to the presence of an additional copy chromosome $21$ (trisomy $21$ ).

Q. Assertion (A) Down’s syndrome is a Mendelian disorder. Reason (R) It is caused due to the presence of an additional copy of chromosome 21.