Question

Find the correct statement.
(1) Generally a gene regulates a trait, but sometimes one gene has effect on multiple traits.
(2) The trait AB-blood group of man is regulated by one dominant allele and another recessive allele. Hence it is co-dominant.

• A. Both the Statements are wrong.
• B. Statement (1) is correct.
• C. Statement (2) is correct.
• D. Both Statements (1) and (2) are correct.

Answer 1

The Correct Option is B

The correct answer is (B) : Statement (1) is correct.

Answer 2

The correct answer is: (B) Statement (1) is correct.

Let's analyze the two statements:

• Statement (1): "Generally a gene regulates a trait, but sometimes one gene has an effect on multiple traits."

  This statement is correct. A single gene typically regulates a specific trait, but some genes can affect multiple traits. This phenomenon is known as pleiotropy. For example, a gene may control several characteristics or phenotypic traits, such as coat color and eye color in certain animals.

• Statement (2): "The trait AB-blood group of man is regulated by one dominant allele and another recessive allele. Hence it is co-dominant."

  This statement is incorrect. The AB blood group is regulated by two co-dominant alleles, A and B. Both alleles are expressed equally, and neither is dominant or recessive. Therefore, the AB blood group is an example of co-dominance, but the explanation given is not accurate.

Thus, the correct answer is that Statement (1) is correct.