Select the correct statements with respect to sexdetermination in chicks :-
(A) Female is heterogametic
(B) Male is heterogametic
(C) Male is homogametic
(D) It has XX–XO type of sex determination

Options

A. A & C are correct
B. A, C & D correct
C. Only B is correct
D. B & D are correct

Answer

To solve the question regarding sex determination in chicks, we need to analyze each statement provided:

1. **Understanding the sex determination system in birds**:
- In birds, including chicks, the sex determination system is known as the ZW system. In this system:
- Females are heterogametic (ZW), meaning they produce two types of gametes (Z and W).
- Males are homogametic (ZZ), meaning they produce only one type of gamete (Z).

2. **Evaluating the statements**:
- **Statement (A)**: Female is heterogametic.
- This statement is **correct**. Females have the ZW configuration.
- **Statement (B)**: Male is heterogametic.
- This statement is **incorrect**. Males are homogametic (ZZ).
- **Statement (C)**: Male is homogametic.
- This statement is **correct**. Males have the ZZ configuration.
- **Statement (D)**: It has XX–XO type of sex determination.
- This statement is **incorrect**. The XX–XO system is found in some insects, not in birds.

3. **Conclusion**:
- The correct statements regarding sex determination in chicks are:
- (A) Female is heterogametic.
- (C) Male is homogametic.

Thus, the correct answer is **A and C**.