Which statement is NOT true about mitosis?
Mitosis produces two daughter cells that contain the same kinds of chromosomes as the parent cell.
Mitosis uses a diploid (2n) parent cell to form daughter cells containing a haploid number ?of chromosomes.
Mitosis is involved in development of a fertilized egg into a multicellular organism.
Mitosis is a process that duplicates and divides the nuclear contents only.
Mitosis produces two daughter cells that contain the same number of chromosomes as the parent cell.
The correct answer and explanation is :
The statement that is NOT true about mitosis is:
“Mitosis uses a diploid (2n) parent cell to form daughter cells containing a haploid number (n) of chromosomes.”
Explanation:
Mitosis is a type of cell division that results in two daughter cells, each with the same chromosome number as the parent cell. Here’s why the statement is incorrect and the other statements are true:
- Mitosis produces two daughter cells that contain the same kinds of chromosomes as the parent cell:
- This statement is true. Mitosis ensures that the two daughter cells are genetically identical to the parent cell. The number of chromosomes and the types of chromosomes (species-specific chromosomes) remain unchanged after mitosis.
- Mitosis uses a diploid (2n) parent cell to form daughter cells containing a haploid number (n) of chromosomes:
- This statement is incorrect. Mitosis begins with a diploid (2n) parent cell, which contains two sets of chromosomes (one from each parent). It divides the chromosomes equally between two daughter cells. Both daughter cells retain the diploid (2n) number of chromosomes, not a haploid (n) number. The process of meiosis, not mitosis, results in haploid cells. Meiosis is the type of cell division that produces gametes (sperm and egg cells), which contain half the number of chromosomes as the parent cell.
- Mitosis is involved in the development of a fertilized egg into a multicellular organism:
- This statement is true. After fertilization, the zygote (fertilized egg) undergoes mitosis to form multiple cells, leading to the development of a multicellular organism. The process of mitosis helps in growth, repair, and asexual reproduction.
- Mitosis is a process that duplicates and divides the nuclear contents only:
- This statement is true. Mitosis involves the duplication and division of the nucleus. The process occurs in stages: prophase, metaphase, anaphase, and telophase, followed by cytokinesis, which divides the cytoplasm, ensuring that both daughter cells are formed properly.
- Mitosis produces two daughter cells that contain the same number of chromosomes as the parent cell:
- This statement is true. Mitosis maintains chromosome number, meaning that the daughter cells have the same number of chromosomes as the original parent cell.
Thus, the incorrect statement is the one that suggests mitosis results in haploid daughter cells, which is a characteristic of meiosis, not mitosis.