Which type of sex determination is found in birds ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Sex Determination**: In birds, sex determination is based on the presence of specific sex chromosomes. Unlike mammals, where the male is XY and the female is XX, birds have a different system.

2. **Identifying the Chromosomes**: In birds, the sex chromosomes are referred to as Z and W. The male birds have two Z chromosomes (ZZ), while female birds have one Z and one W chromosome (ZW).

3. **Male and Female Designation**:
- Males: ZZ (homozygous for Z)
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