Best material for the study of mitosis in laboratory is:
Show Hint
Root tips have an active meristematic zone in which cells mitotically divide leading to an increase in the length of the roots.
- anther
- root tip
- leaf tip
- ovary
The Correct Option is B
Approach Solution - 1
Root tips have an active meristematic zone in which cells mitotically divide leading to an increase in the length of the roots.
- As compared to the leaf tip, the root tip is the best material to study mitosis.
- The root tip is a part of the plant body that grows rapidly.
- The root tips can be prepared in a way allowing them to lie flat on a microscopic slide so that chromosomes of individual cells can be individually observed.
Hence, the correct answer is option B) the best material for the study of mitosis in laboratory is root tip.
Approach Solution -2
Root tips are the best option in order to study mitosis. It is characteristic of meristematic cells present at the tip of the roots that provide the most suitable and sufficient raw material to study the different mitosis stages.
Approach Solution -3
The correct option is B: Root Tip
The sites of mitotic cell division in a plant are meristematic regions. Mitosis can be easily studied in greases of root and stem tips, which contain rapidly dividing apical meristems.
Approach Solution -4
Mitosis occurs both in somatic cells as well as in germ cells of the gonads. In plants, mitosis occurs in the meristematic cells of the root tip or shoot tip. These cells divide at a faster rate. So the root tip shows active cell division and is used in the laboratory to study mitosis.
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Concepts Used:
Mitosis
Mitosis is a cell division stage of the cell cycle during which DNA in the nucleus cell gets split into two equal chromosome sets. Cell division results in the formation of genetically identical cells with the same number of chromosomes. Mitosis is also known as equational division.
Features of Mitosis:
- In each cycle of cell division, two daughter cells are formed from the parent cell.
- The cell is also known as equational cell division because the chromosome number in the parent cell and daughter cell is the same.
- In plants, mitosis leads to the growth of vegetative parts of the plant like root tip, stem tip, etc.
- Segregation and combination do not occur in this process.
Read Also: Mitosis Stages
Stages of Mitosis are:
- Interphase: Technically, it is not a part of mitosis, however, it is still a crucial process as it leads up to the process of mitosis. Hence, the interphase refers to all the other stages of cell cycle other than mitosis.
- Prophase: It is the first stage of mitosis. It is also the longest phase of mitosis, where the chromatin condenses into chromosomes and the nuclear membrane breaks down (in prometaphase). In animal cells, the centrioles located near the nucleus begin to split and move to the opposite ends of the cell.
- Metaphase: In this phase, the microtubules pull on the chromosomes with equal force, and the chromosome moves to the center of the cell.
- Anaphase: This phase is marked by the splitting of the sister chromatids. These sister chromatids then become the chromosomes of the daughter nuclei.
- Telophase: It is the final phase of mitosis. It begins after the replicated, paired chromosomes are separated and pulled at the opposite ends of the pole.
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