Which among the following is cell division without growth Mcq?
Cell division MCQ Question 6 Detailed Solution The correct answer is meiosis.
Which is the final phase of cell division Mcq?
Telophase- It is the final stage of mitosis, where the movement of chromosomes stops.
In which phase of cell division does crossing over take place Mcq?
Explanation: Crossing over occurs during Pachytene. Pachytene is a 3rd stage of the prophase of meiosis. Explanation: Polyploidy s condition in which normally diploid cell acquires one or more additional sets of chromosomes.
Who coined the term mitosis Mcq?
Explanation: Walther Flemming in 1882 introduced the term mitosis. It is the process where one round of DNA replication is trailed by a single round of chromosomal segregation.
Where does Synapsis occur?
Synapsis takes place during prophase I of meiosis. When homologous chromosomes synapse, their ends are first attached to the nuclear envelope. These end-membrane complexes then migrate, assisted by the extranuclear cytoskeleton, until matching ends have been paired.
Which is the final phase of cell division?
Cytokinesis is the final physical cell division that follows telophase, and is therefore sometimes considered a sixth phase of mitosis.
Which cell phase is the shortest?
- The mitotic phase is usually the shortest part of any cell cycle.
- Throughout mitosis, certain checkpoints are essential to the continuation of the process.
- There are three main checkpoints in mitosis, and those include the G1/S checkpoint, G2/M, and metaphase/ anaphase checkpoint.
What means tetrad?
Definition of tetrad : a group or arrangement of four: such as. a : a group of four cells produced by the successive divisions of a mother cell a tetrad of spores. b : a group of four synapsed chromatids that become visibly evident in the pachytene stage of meiotic prophase.
What is Karyokinesis and cytokinesis?
Karyokinesis vs Cytokinesis Karyokinesis means the process of division of the nucleus. Cytokinesis means the process of division of cytoplasm. Division. The nucleus gets divided into two daughter nuclei. The cytoplasm, cell organelles and the nuclei divide and are passed on to daughter cells equally.
Which is the longest phase in cell division?
Interphase is the longest phase in a cell’s life cycle. It accounts for 95 per cent of the duration of the cell cycle. The other phase is the M phase or mitosis phase.
What is the longest part of mitosis?
The first and longest phase of mitosis is prophase. During prophase, chromatin condenses into chromosomes, and the nuclear envelope (the membrane surrounding the nucleus) breaks down. In animal cells, the centrioles near the nucleus begin to separate and move to opposite poles of the cell.
What is G of cell cycle?
What is G0 phase in cell cycle? The G0 phase, also known as the resting phase, is the period of the cell cycle during which the cell is neither dividing nor preparing to divide. The G0 phase is often thought of as an extension of interphase.
Which cell organelle is most important?
Of all eukaryotic organelles, the nucleus is perhaps the most critical. In fact, the mere presence of a nucleus is considered one of the defining features of a eukaryotic cell. This structure is so important because it is the site at which the cell’s DNA is housed and the process of interpreting it begins.
What is the group of 4 chromosomes called?
meiosis and chromosome role Each pair of chromosomes—called a tetrad, or a bivalent—consists of four chromatids. At this point, the homologous chromosomes exchange genetic material by the process of crossing over (see linkage group).
Can heart cells divide?
As a result, parts of the heart become thin and fail to beat properly. Because fully developed heart cells do not divide, medical experts viewed the organ as unable to regenerate after injury.