Mechanism of genetic continuity in mitosis is due to

Options

A. segregation of maternal and paternal chromosomes
B. duplication of DNA
C. crossing over
D. halving of chromosomes

Answer

### Step-by-Step Text Solution

1. **Understanding Mitosis**: Mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. This process is also referred to as equational division because the chromosome number remains the same before and after the division.

2. **Chromosome Duplication**: Before mitosis occurs, the DNA within the parent cell undergoes replication. This means that each chromosome is duplicated, resulting in two identical copies (sister chromatids) for each chromosome.

3. **Segregation of Chromosomes**: During mitosis, the duplicated chromosomes are aligned and then segregated into two separate daughter cells. This ensures that each daughter cell receives an identical set of chromosomes.

4. **Diploid Nature of Daughter Cells**: After mitosis, the two daughter cells are diploid, meaning they have the same number of chromosomes as the original parent cell. This is crucial for genetic continuity, as it ensures that the genetic information is preserved across generations of cells.

5. **Cytokinesis**: Following the segregation of chromosomes, the cytoplasm of the parent cell divides through a process called cytokinesis, leading to the formation of two distinct daughter cells.

6. **Conclusion**: The mechanism of genetic continuity in mitosis is primarily due to the duplication of DNA and the subsequent segregation of chromosomes, ensuring that the daughter cells retain the same genetic information as the parent cell.

### Final Answer
The mechanism of genetic continuity in mitosis is due to the **duplication of DNA**.

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