Sex chromosomes of a female bird are represented by

Options

A. XO
B. ZZ
C. ZW
D. XX

Answer

To solve the question regarding the sex chromosomes of a female bird, we can follow these steps:

### Step 1: Understand the context of sex chromosomes in birds
- In birds, the sex determination system is different from that of mammals. While mammals have an XX/XY system, birds utilize a ZW/ZZ system.

### Step 2: Identify the sex chromosomes of female birds
- Female birds possess ZW sex chromosomes, where 'Z' is one type of sex chromosome and 'W' is the other. The presence of ZW indicates a female, while ZZ indicates a male.

### Step 3: Analyze the options provided
- The options given are:
1. XO
2. ZZ
3. ZW
4. XX

### Step 4: Evaluate each option
- **XO**: This system is typically found in grasshoppers and is not applicable to birds.
- **ZZ**: This represents male birds, not females.
- **ZW**: This is the correct representation of female bird sex chromosomes.
- **XX**: This system is found in female humans and not applicable to birds.

### Step 5: Conclude the correct answer
- Based on the analysis, the correct answer is **ZW**, which represents the sex chromosomes of a female bird.

### Final Answer:
The sex chromosomes of a female bird are represented by **ZW**.

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