Pick up the odd homologous pair out

Options

A. Barthlin's gland-Cowper's gland
B. Clitoris-Penis
C. Mons pubis-Glans penis
D. Labia major-Scrotum.

Answer

To solve the question of identifying the odd homologous pair from the given options, we can follow these steps:

### Step 1: Understand the Concept of Homologous Structures
Homologous structures are anatomical features in different species that share a common ancestry. In the context of human reproduction, homologous structures refer to male and female reproductive organs that develop from the same embryonic tissue.

### Step 2: Analyze Each Option
Let's break down each option to identify the homologous pairs:

- **Option A: Bartholins glands, Poppers glands**
- Bartholins glands (female) correspond to the bulbourethral glands (Cowper's glands) in males. This is a homologous pair.

- **Option B: Clitoris, Penis**
- The clitoris in females is homologous to the penis in males. This is a homologous pair.

- **Option C: Mons pubis, Glands penis**
- The mons pubis in females does not have a direct homologous structure in males. The glands penis (which includes the glans of the penis) is a male structure. This pair does not share a common embryonic origin.

- **Option D: Labia majora, Scrotum**
- The labia majora in females correspond to the scrotum in males. This is a homologous pair.

### Step 3: Identify the Odd Pair
From the analysis, we can see that:
- Options A, B, and D all consist of homologous pairs.
- Option C (Mons pubis and glands penis) does not consist of homologous structures.

### Conclusion
The odd homologous pair out is **Option C: Mons pubis and glands penis**.

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