Science
If the skin cells start dividing by meiosis instead of mitosis, what do you think will happen to a cut on the skin?
Cell
1 Like
Answer
Repair of a cut on the skin requires mitosis, which produces two genetically identical daughter cells with the same number of chromosomes as the parent cell. If skin cells started dividing by meiosis instead of mitosis, the new cells would have only half the number of chromosomes and would not be identical to the original skin cells.
As a result, the cut would not heal properly. The new cells produced would not be able to function normally as skin cells, so the wound would fail to close and the damaged tissue would not be replaced correctly. Meiosis is meant only for the formation of gametes and not for the growth and repair of body tissues.
Answered By
1 Like
Related Questions
Draw a well-labelled schematic diagram of a plant or an animal cell using these clues —
(i) Nucleus appears as a dark and round body inside the cell.
(ii) ER spreads like a network of extended nuclear envelope.
(iii) Mitochondria and chloroplasts are rod shaped.
You may refer to Fig. 2.10.
Instead of many small ones, why does a cell not have a single giant mitochondrion? How does this relate to the concept of surface area?
Differentiate between the following pairs of terms based on the clues given in parentheses:
(i) Cell membrane and cell wall (permeability)
(ii) RER and SER (structure)
(iii) Chloroplasts and chromoplasts (pigments)
Two similar animal cells are placed in two different solutions:
- Cell X is placed in pure water.
- Cell Y is placed in a concentrated salt solution.
Cells are observed after some time. Cell X swells, and Cell Y shrinks. Which statement provides the correct explanation for the above observations?
(i) Salt molecules moved into Cell Y, causing it to shrink.
(ii) Water moved into Cell X and more water moved out of Cell Y than the salt solution entered in it.
(iii) Water moved into Cell X and moved out of Cell Y through the cell membrane.
(iv) Solute movement caused osmosis in both cells.