In an angiosperm, the number of microspore mather cells involved in production of 120 male gametes is

Options

A. 30
B. 60
C. 15
D. 40

Answer

To solve the question regarding the number of microspore mother cells involved in the production of 120 male gametes in an angiosperm, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Microspore Mother Cells**:
Microspore mother cells (also known as microsporocytes) are diploid cells that undergo meiosis to produce haploid microspores.

2. **Meiosis and Microspore Formation**:
Each microspore mother cell undergoes meiosis, resulting in the formation of 4 haploid microspores. This process is called microsporogenesis.

3. **Microspores to Pollen Grains**:
Each haploid microspore develops into a pollen grain. Therefore, from one microspore mother cell, we get 4 pollen grains.

4. **Pollen Grains and Male Gametes**:
Each pollen grain produces 2 male gametes (sperm cells) upon germination. Thus, from 4 pollen grains, we get:
\[ 4 \text{ pollen grains} \times 2 \text{ male gametes per pollen grain} = 8 \text{ male gametes} \]

5. **Calculate the Number of Microspore Mother Cells Needed**:
To find out how many microspore mother cells are needed to produce 120 male gametes, we can set up the equation:
\[ \text{Number of microspore mother cells} = \frac{\text{Total male gametes}}{\text{Male gametes produced per microspore mother cell}} \]
Substituting the values:
\[ \text{Number of microspore mother cells} = \frac{120}{8} = 15 \]

6. **Conclusion**:
Therefore, the number of microspore mother cells involved in the production of 120 male gametes is **15**.

### Final Answer:
The number of microspore mother cells involved in the production of 120 male gametes is **15**.

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