As with so many scientific terms, the word meiosis comes from the Greek, in this case meíōsis, which means “a lessening.” This idea makes sense, as meiosis creates cells with half the chromosomes than the original.
What is the root word for mitosis?
The term “mitosis”, coined by Walther Flemming in 1882, is derived from the Greek word μίτος (mitos, “warp thread”).
What is the meaning of word meiosis?
Meiosis is the process by which the nucleus divides in all sexually reproducing organisms during the production of spores or gametes. These cells have a single set of chromosomes and are called haploid, as opposed to diploid cells with two sets.
What does meiosis mean in science?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. … Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
What is example of meiosis?
The definition of meiosis is the process of cellular division. An example of meiosis is when a chromosome reduces from a double cell to a single cell.
What is meiosis in biology class 10?
Meiosis is a type of cell division during which a single cell divides twice and produces four daughter cells. These four daughter cells contain half the amount of genetic material and known as our sex cells (gametes).
Why is meiosis 2 necessary?
The cells are diploid, therefore in order to distribute the chromosomes eqully among the daughter cells so that they contain half the chromosome , Meiosis II is necessary. … It reduces the chromosome number to half so that the process of fertilisation can restore the original number in the zygote.
Where does meiosis take place?
During fertilisation, two haploid gametes fuse to form one diploid cell. This will divide by mitosis to form an organism. Meiosis occurs in the testes of men and ovaries of women.
What is meiosis Class 9?
Meiosis is the process in which a single cell divides twice to form four haploid daughter cells. These cells are the gametes – sperms in males and egg in females.
What is the anaphase of meiosis?
During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle. … The separated chromosomes are then pulled by the spindle to opposite poles of the cell.
What does anaphase 2 look like?
During anaphase II, the third step of meiosis II, the sister chromatids of each chromosome separate and move toward opposite poles. … As the chromosomes are dragged along by the spindle apparatus, their arms can be seen dragging along behind so that the chromosomes form V-shapes.
What is meiosis and litotes?
is that litotes is (rhetoric) a figure of speech in which the speaker emphasizes the magnitude of a statement by denying its opposite; a figure of speech in which understatement is used with negation to express a positive attribute; a form of irony while meiosis is (countable|rhetoric) a figure of speech whereby …