Untitled Storyboard
نص القصة المصورة
- الانزلاق: 1
- Ooo yes! That in fact is an Asian Mallard. It is the practically ancestor to all ducks!
- Hey Grandpa! I see a duck!
- الانزلاق: 2
- Alrighty! Well first off, this duck started off as a little tiny cell. chromatin turns into chromosomes, and the nuclear membrane breaks down which causes for the spindle fibers to form.
- Tell me more!!
- الانزلاق: 3
- Then, chromosomes start to line up in the cell, and they are attached to the spindle fibers.
- Wow... then what happens?
- الانزلاق: 4
- Well, certain chromatids called "Sister chromatids" are pulled apart to opposite ends of the cell. The nuclear membranes reform around the sets of chromosomes, which begin to unwind back into chromatin.
- The duck keeps looking at me!
- الانزلاق: 5
- The cytoplasm then divides, resulting in two separate daughter cells!
- Thats really cool grandpa! I have a question. Why do cells divide?
- الانزلاق: 6
- Good question Mariah. Cells divide for a number of reasons. Two of them being-- whenever you get a small cut, or a bruise, cells divide to replace those hurt and broken cells. They also divide to help you and other organisms grow!
- Oh! Okay. But what happens if they divide uncontrollably?
- الانزلاق: 7
- Well, if cells divide uncontrollably, that results in a Cancer. Cancer is when cells in your body grown nonstop, which is not normal.
- Oh man... that sucks! But wait... where does the first cell come from?
- الانزلاق: 8
- Cells form from a process called, Meiosis. 2 adults, do their thing which causes for the sperm, and the egg to collide. The homologous pairs align at the cells equatorial plate.
- Mhm... okay then what?
- الانزلاق: 9
- Then, the homologous chromosomes are pulled apart to opposite ends of the cell and the cell divides into two cells, each with half the original number of chromosomes.
- mhm.. i dont understand.
- The chromosomes condense, and a spindle forms in each cell. The chromosomes align in each cell and the sister chromatids are pulled apart to opposite ends. Lastly, the Nuclear membranes reform, resulting in 4 haploid daughter cells!
- الانزلاق: 10
- Thats a great question. It is because, when the cells are produced by cell division, they get a copy of DNA, or all the chromosomes it has in it's nucleus.
- Wow I kinda get it. One more question Grandpa, how does cell division allow for each cell to stay identical?
- Wowww thats really cool! It's like they have a memory card!-- oh and look! there's more ducks!!
- Yes Mariah, Yes it is! We just discussed the processes of Mitosis and Meiosis. Let's go feed the ducks!
تم إنشاء أكثر من 40 مليون لوحة قصصية
لا توجد تنزيلات ولا بطاقة ائتمان ولا حاجة إلى تسجيل الدخول للمحاولة!
