Cell & Cell Division Flashcards
Mitosis
Equational division. It is a kind of cell division that results in the formation of two daughter cells each having the same number and kind of chromosomes as the parent nucleus
Meiosis
Type of cell division that results in 4 daughter cells each with half number of chromosomes of the parent cell as in the production of the plants spores.
Divide itself into 4 non identical haploid daughter cells.
It is a reduction division. = 2n = n [½]
Body’s beginning
By a single cell zygote’s division
Zygote division method
Mitosis = as it is an equational division
Why does a cell divide?
Cell divides due to the disturbance in the nucleus and the cytoplasmic ratio. So basically what happens as the cell grows the nucleus tends to lose control due to the increase in surface area of the cells as the nucleus remains same without any tendency of physical grow and controlling the entire cell activities and functions that are taking place becomes harder for the nucleus due to which it divides into two daughter cells
Differentiation
The self are differentiated and assign particular functions that they are supposed to perform such as liver cells brain cells skin cells etcetra. They all perform different functions and act as a unit for the living beings
Formation of living organisms
All cells reproduced by dividing into two with each parental cell giving rise to two daughter cells each time the divide these. These newlyfom daughter cell can grow and divide giving arise to a new cell population that is formed by the growth and division of a single parental cell and its progeny. In other words such cycles of growth and duration allow single cell to form a structure consisting a millions of cells.
Processes during cell division
DNA replication cell division and cell group take place in a coordinator way to ensure correct divisions and formation of progeny cells containing intact genoms. The sequence of of events by which you cell duplicate its genome synthesizes The Other constituents of the cell and eventually divides into daughter cells is termed as cell cycle. Altho the cell growth in terms of cytoplasmic increase is a continuous process, DNA synthesis occurs only during one specific stage in the cell cycle the application chromosomes or DNA are then distributed to daughter nuclei by Complex series of events during cell division these events are themselves under genetic control
What is cdk
Cell cycle and self control are regulated by multiple protein such a cycling and cycling dependent kinase
What are the phases of cell cycle
- interphase
- m phase or mirosis phase
- G1 phase
- S phase (synthesis)
- G2 phase
What time does it typical Eukaryotic cell take for division
The cells divide once in approximately every 24 hours
Time taken for cell division in yeast
90 minutes — 1 cell cycle
What are the two phases of cell cycle
Interface and amphase. The mface represents the phase when the actual cell division or mitosis occurs and interface represents the face between two successive mfaces it is significant to know that in the 24 hour average duration of a cell cycle of human cell cell division properly last only about an hour the interface last more than 95% of the duration of cell cycle
M phase
M phase starts with the nuclear division corresponding to the separation of daughter cells that is called (karyokinesis) and usually ends with the division of cytoplasm (cytokinesis)
Interphase
the interphase, though, called the resting phase, is the time during which the cell is preparing for division by undergoing both cell growth and the DNA replication in an orderly manner. The interface is divided into three further faces called the GPS. S phase. And G2 phase.
