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 Occur in______
a) M phase
b) S phase
c) G1 Phase
d) G2 phase
Explanation: The first phase of the cell cycle is the phase G1. It is an integral part of Interphase. RNA and protein synthesis occur in Phase G1.
2.When Synapsis Occurs at Meiosis?
Explanation: Zygotene is the second stage of Meiosis prophase. Bivalents are seen as shaping the synaptonemal complexes.
3.Spindle Fibers are Formed by___________
Explanation: Tubulin is a Globular Protein Protein. They form microtubules. 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 a cell cycle phase, in which typical cells submit most of their lives.
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 cytoplasm of a parental cell into two daughter-cells.
8.Polyploidy may be inducted Artificially by__________
b) Line breeding
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 Chromosome organizes itself in the middle of the cell.
10. Chiasmata Formation Takes Place During __________
a) Prophase I
b) Metaphase I
c) Anaphase I
d) Telophase I
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 chromosome 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 synaptonemic complex dissolves, when chromatids are transparent and tetrads are considered bivalents