What is Mitosis ?

-
 
Mitosis is a process where a single cell divides into two identical daughter cells (cell division).

 During mitosis one cell divides once to form two identical cells.

 The major purpose of mitosis is for growth and to replace worn out cells.

 If not corrected in time, mistakes made during mitosis can result in changes in the DNA?  that can potentially lead to genetic disorders ?.

 Mitosis is divided into five phases:

 1. Interphase:

 The DNA in the cell is copied in preparation for cell division, this results in two identical full sets of chromosomes ?.

 Outside of the nucleus?  are two centrosomes, each containing a pair of centrioles, these structures are critical for the process of cell division.

 During interphase, microtubules extend from these centrosomes.

 2. Prophase:

 The chromosomes condense into X-shaped structures that can be easily seen under a microscope.

 Each chromosome is composed of two sister chromatids, containing identical genetic information.

 The chromosomes pair up so that both copies of chromosome 1 are together, both copies of chromosome 2 are together, and so on.

 At the end of prophase the membrane around the nucleus in the cell dissolves away releasing the chromosomes.

 The mitotic spindle, consisting of the microtubules and other proteins, extends across the cell between the centrioles as they move to opposite poles of the cell.

 3. Metaphase:

 The chromosomes line up neatly end-to-end along the center (equator) of the cell.

 The centrioles are now at opposite poles of the cell with the mitotic spindle fibers extending from them.

 The mitotic spindle fibers attach to each of the sister chromatids.

 4. Anaphase:

 The sister chromatids are then pulled apart by the mitotic spindle which pulls a chromatid to a pole and the other chromatid to the opposite pole.

 5. Telophase:

 At each pole of the cell a full set of chromosomes gather together.

 A membrane forms around each set of chromosomes to create two new nuclei.

 The single cell then pinches in the middle to form two separate daughter cells each containing a full set of chromosomes within a nucleus.  This process is known as cytokinesis.

Comments

Post a Comment

Popular posts from this blog

Three-camera iPhone is being enjoyed, these memes will make you cool

-
Image
Three-camera iPhone is being enjoyed, these memes will make you cool   Apple has launched the iPhone 11 series.  Introduced at the Steve Jobs Theater in Cupertino, California, the series includes the iPhone 11, iPhone 11 Pro and iPhone 11 Pro Max.  The initial price of iPhone 11 in the US is $ 699. At the same time, the price of iPhone 11 Pro is $ 999 and the initial price of iPhone Pro Max is 1,099.   According to the information given by the company, Apple also announced a huge cut in the price of most basic models.  Along with this, the company also announced to enter the emerging market of online streaming.  For your information, let me tell you that the iPhone 11 has two rear cameras, but the iPhone 11 Pro and iPhone 11 Pro Max have triple rear camera setup.  The phone with three cameras is making a lot of fun on social media.   While stating that people made Apple's three-camera i-phone on social media as a stove, someone made three eyes of an animal.  Many such
Read more >>>

5 Facts about India

-
Image
1) Oldest inhabited place in world is in India - Varanasi 2) The only lake in world formed by a meteorite is in India - Lonar lake 3) The shampoos were firstly invented in  India  4) World's highest Cricket ground is located in india - Himachal Pradesh 5) The first Indian rocket was Transported in a cycle.
Read more >>>

5 Reason why India will become a Superpower.

-
Image
When you think about the superpower country you might obviously think about China ,America ,Russia but what will happen if I say that India will soon be the superpower of world. Here the 5 reason, 1) Geographical location: After 20 year if there will be a shortage of renewable source many country will look India as their energy source. Because India has many rivers which will be the source of hydroelectricity and India also receives plenty of Sunlight and thus  solar energy can be generated because of this sunlight. 2) Military: India's military second biggest military in the world and his fourth most powerful Military of world but as military power of India is increasing  India military will be the most powerful military in world. India also spends 2.5% of its GDP in military 3) Diplomacy: India has strong and good relation with other country except Pakistan this diplomacy of India will lead India in UNSC which will help India to become a permanent member of UNSC. 4) E
Read more >>>

Population control law may be implemented in India soon.

-
Image
Population control law may be implemented in India soon. A few days ago, the Prime Minister of India, Narendra Modi, in his speech in the Red Fort, while talking about the increasing population of India, had expressed concern over this, Modi said that if our population was less today, we would be better than you.  And live a happier life. India's population has now reached 135  crore which is increasing every second and by 2030 India will be the world's most populous country. So far, three meetings have been held in the Ministry of Home Affairs on this subject and the next meeting may be held till 30 September. What's your opinion,Please Comment.
Read more >>>

After The R.I.P of Telecom Companies it's time for Gigafiber Companies.

-
Image
On 12 August 2019,Jio has launched it's new postpaid plan.Thus it is said now that After The R.I.P of Telecom Companies it's time for Gigafiber Companies. Jio has launched it's new postpaid service which would commercially be available from 5 September 2019. For this Jio is giving a T.V set top box,4K Television,Router/Boardband,a Landline phone and High speed data + free call and first day first show of any movie on your television.
Read more >>>

These are the world's 5 most powerful air force, you will not believe knowing the stage of India

-
Image
This is the world's 5 most powerful air force, you will not believe knowing the location of India  Today we will tell you about the 5 most powerful air force in the world.  Before the Second World War, the Air Force did not have that much importance because at that time there were not so good aircraft.  When the Air Force was used in the Second World War, countries understood its importance that a powerful Air Force could change the outcome of war.  Today, America is maintaining its dominance over the world on the strength of its air force.  This is the 5 most powerful air force in the world -  5.  United Kingdom  4. India  3. China  2. Russia  1. America  By commenting, definitely tell which place the Air Force of India should stay according to you, where it will be safe all over.  Like and share the information if you like it.  Follow us for similar information.
Read more >>>

Top 9 facts about ISRO

-
Image
 1. ISRO'S EXPENDITURE IN THE LAST 40 YEARS = HALF OF NASA'S SINGLE YEAR BUDGET.  2. ISRO'S BUDGET IS ONLY 0.34 PER CENT OF THE CENTRAL GOVERNMENT EXPENDITURE AT PRESENT AND 0.08 PER CENT OF THE GROSS DOMESTIC PRODUCT (GDP).  There is so little to offer, but in turn ISRO has got more in return to offer back to the nation.  3. SO, YOU THINK IT'S JUST A SMALL ORGANIZATION?  Last year, it saw a turnover of Rs.  14 billion! 4. THEY DO MUCH MORE THAN JUST LAUNCHING SATELLITES.  They are developing an orbital vehicle as well as setting up a training center in Bangalore to train astronauts.  Considering hold your breath, though, this is likely to happen only post 2017.  5. ISRO'S MARS MISSION IS THE CHEAPEST SO FAR, JUST 450 CRORE I.E RS 12 PER KM, EQUIVALENT TO AUTO FARE.  In 2008-09, the Indian Space and Research Organization successfully launched a lunar orbiter, Chandrayaan-1, which discovered evidence of water on the moon.  Mangalyaan was de
Read more >>>