Question

Study the following statements.
(A). Due to incomplete linkage the parental traits are inherited in offsprings.
(B). Due to incomplete linkage new traits occur in offsprings.
(C). X-chromosome of Drosophila males show complete linkage
(D). In Zea mays- color and shape of grain show complete linkage
Choose the correct answer from the options given below:

• A. Statements (A) and (C) are correct
• B. Statements (A) and (D) are correct.
• C. Statements (B) and (D) are incorrect.
• D. Statements (A) and (D) are incorrect.

Hint:

Decide which of the statements are true about complete and incomplete linkage, then see which option correctly describes (A) and (D).

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Complete linkage keeps parental combinations together, because there is no crossing over. Incomplete linkage gives both parental and new recombinant combinations.

Step 2: Check statements (A) and (B)
Statement (A) is false, since only parental traits appear in offspring under complete linkage, not incomplete linkage.
Statement (B) is true, because crossing over in incomplete linkage produces new combinations.

Step 3: Check statements (C) and (D)
Statement (C) is true, as male Drosophila show complete linkage because there is no crossing over in males.
Statement (D) is false, since colour and shape of grain in maize show incomplete linkage.

Step 4: Select the option
Only option (D), 'Statements (A) and (D) are incorrect', matches this.

Final Answer:
Statements (A) and (D) are incorrect. \[ \boxed{\text{(D) }\text{Statements (A) and (D) are incorrect.}} \]