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Significance of Mitosis

Zygote divide...

Question

Zygote divides to form embryo. Does this division take place by mitosis? Do all kinds of cell divisions in our body, except for the division of sex cells take place by mitosis?

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Solution

yes, exactly. You got the concept now. All the somatic cells divide by mitosis.

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Q. Division of the single celled zygote by mitosis is called .

Q. Pick out the correct statements.
(A) Mitosis takes place in the somatic cells and meiosis takes place in the germ cells.
(B) During mitosis, the DNA replicates once for one cell division and in meiosis, the DNA replicates twice for two cell divisions.
(C) Mitosis and meiosis occur both in sexually reproducing organisms.

Q. Fill in the blanks
1. Mitosis is a type of cell Division takes place in_____ cell
2. Meiosis is a type of cell Division takes place in_______ cell
3. In mitosis the chromosome number_____
4. In meiosis the chromosome number_____
5. Mitosis occurs at the time of_________reproduction
6. Meiosis occurs at the time of _________ reproduction

Q. If an interphase cell is treated with cyanide the cell does not divide by mitosis. However if cyanide is added right after mitosis has started the same cell completes mitosis. Which of the following explains this observation?
a) metabolic activity ceases during mitosis
b) cell division does not require metabolic activitactivity
c) energy required for mitosis is produced and stored in the cell during interphase
d) mitotic cells make factors that make them resistant to cyanide

Q. How many divisions of mitosis are required for a somatic cell to form 256 cells?

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