Meiosis is a mechanism in which a single cell divides twice to produce four cells that contain half of the original amount of genetic data. Those cells are our sex cells-male sperm, female eggs.
One cell divides up twice during meiosis to create four daughter cells. These four daughter cells are only half as numerous as chromosomes of the parent cell-haploid.
Meiosis is divisible into nine stages. These are divided between the first division of the cell (meiosis I) and the second division thereof (meiosis II).
1. The RNA and protein synthesis occurs in______
Explanation: The first phase of the cell cycle is phase G1. It is an integral part of the Interphase. RNA and protein synthesis occurs in Phase G1.
2. When does synapsis occur at Meiosis?
Explanation: Zygotene is the second stage of the Meiosis prophase. Bivalents are seen as shaping the synaptonemal complexes. Synapsis facilitates the exchange of genetic material between the chromosomes.
3. Spindle fibers are formed by___________
Explanation: Spindle fibers are made up of microtubules. Microtubules are polymers of alpha- and beta-tubulin dimers. Tubulin is a Globular Protein It helps in dividing cells.
4. Chromosomes break during?
Explanation: The 3rd stage of cell division is anaphase. During this point, chromosomes move away from each other towards opposite spindle poles.
5. Replication of centriole occurs in ______________
Explanation: Interphase is the longest phase of the cell cycle in which typical cells submit most of their lives. It is divided into the G1, S phase, and G2 phase. The S phase is characterized by biosynthetic activity such as duplication of DNA and centrioles.
6. Colchicine arrests which of the following stages of cell division?
Explanation: Colchicine is an alkaloid in its natural state. It is used to treat acute gout attacks. Colchicine arrests metaphase for the stage of the division of cells.
7. Cell Plate is laid during __________
Explanation: Cytokinesis is a process of cell division that divides the cytoplasm of a parental cell into two daughter cells.
8. Polyploidy may be induced artificially by__________
Explanation: Polyploidy’s condition where diploid cells normally get one or more extra sets of chromosomes. Colchicine can cause polyploidy, artificially.
9. There are chromosomes arranged along the equator ___________
Explanation: Metaphase is the 2nd level of cell division. During metaphase, the chromosome organizes itself in the middle of the cell.
10. Chiasmata formation takes place during __________
Explanation: The formation of chiasmata takes place during prophase I, and chromosomes are duplicated during this period. Chiasmata is a spot where paired chromosomes stay in contact during the first meiosis metaphase.
1. The word meiosis had been coined by?
Farmer and Moore
2. During meiosis, chromatids of individual chromosomes separate during ___?
3. Meiosis is of evolutionary significance as it produces ___?
generally similar daughter cells
four daughter cells
4. In metaphase I, the centromeres undergo division.
do not divide
divide but do not separate
are not similar
5. Call the step of prophase I when synaptonemal complex dissolves when chromatids are transparent and tetrads are considered bivalents?
The above article provides solved MCQs on Meiosis. The explanations of the MCQs are also given. Students can refer to this article for practicing questions. It will help them to revise the concept of Meiosis.
1. How does DNA replication occur in Meiosis?
What happens is in Meiosis the DNA replication just occurs only once. This happens when the cells divide twice and this mechanism produces the genetic variation in daughter cells. We can notice that the number of chromosomes in the newly formed cell is the same as that in the parent cell.
2. What is the result if the cell does not undergo Meiosis?
Meiosis is very important as without this the organisms cannot reproduce and also the most important thing is if the organisms undergo the process of mitosis it won’t be possible to replace the worn-out cells. So both meiosis and mitosis are important cellular processes.