When a cell divides, it creates two identical daughter cells that each carry a copy of the original cell’s DNA. The name for this process is mitosis, and errors in the process result in incorrect DNA copies.
What causes errors in mitosis and meiosis?
Chromosome abnormalities often happen due to one or more of these: Errors during dividing of sex cells (meiosis) Errors during dividing of other cells (mitosis) Exposure to substances that cause birth defects (teratogens)
What could go wrong during meiosis?
Errors during meiosis can lead to mutations in gametes. Defective gametes that undergo fertilization may result in miscarriages or ultimately lead to genetic disorders. The most likely mistake to occur during meiosis is chromosomal non-disjunction, which results in the wrong number of chromosomes in a sex cell.
What is the danger of mitosis?
DNA damage. Attempting to repair DNA during mitosis is highly dangerous for cells and can result in the fusion of telomeres, failed separation of chromatids during anaphase, and the promotion of genomic instability and cancer (22).
What disease is associated with mitosis?
Mistakes during mitosis lead to the production of daughter cells with too many or too few chromosomes, a feature known as aneuploidy. Nearly all aneuploidies that arise due to mistakes in meiosis or during early embryonic development are lethal, with the notable exception of trisomy 21 in humans.
Where does mitosis occur in our body?
Mitosis occurs in the cells for growth and for repair and replacement of the damaged and dead cells. Mitosis occurs actively in the bone marrow and skin cells to replace cells, which have a limited lifespan.
Where does meiosis occur in our body?
Meiosis occurs in the sex cells, so the sperm and egg cells in the human body, to create even more of themselves.