Both chromosomes as well as genes do not occur in pairs in .

Options

A. Somatic cells
B. Fertilized egg
C. Megaspore
D. Microspore

Answer

To answer the question, "Both chromosomes as well as genes do not occur in pairs in," we need to identify the type of cell where chromosomes and genes exist in a single copy rather than in pairs.

### Step-by-Step Solution:

1. **Understanding Chromosome Types**:
- Chromosomes can be classified based on their number of sets. Diploid cells (2n) have pairs of chromosomes (one from each parent), while haploid cells (n) have only one set of chromosomes.

2. **Identifying Cell Types**:
- Somatic cells (body cells) are typically diploid, meaning they contain pairs of chromosomes.
- Zygotes, formed after fertilization, are also diploid as they contain genetic material from both parents.
- Megaspores and microspores, which are involved in sexual reproduction in plants, are haploid. They result from meiosis, which reduces the chromosome number by half.

3. **Conclusion**:
- Since megaspores and microspores are haploid, they do not have pairs of chromosomes or genes. Therefore, the answer to the question is that both chromosomes and genes do not occur in pairs in **megaspore and microspore**.

### Final Answer:
Both chromosomes as well as genes do not occur in pairs in **megaspore and microspore**.

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