Mitosis - Stages of Mitosis | Cells | Biology | FuseSchool скачать в хорошем качестве

Mitosis - Stages of Mitosis | Cells | Biology | FuseSchool

Mitosis - Stages of Mitosis | Cells | Biology | FuseSchool In this video we are will look at mitosis, including the names of the key stages: interphase, prophase, metaphase, anaphase, telophase and cytokinesis. Mitosis is the process of cell division that produces identical copies of cells, and is involved in growth, cell repair and asexual reproduction. When cells divide by mitosis, the number of cells increases, and hence the organism grows. Different organisms have different numbers of chromosomes. A chromosome is made up of two chromatids; one from the mother and one from the father. During interphase, the chromosomes duplicate and become two identical chromatids, joined at the centromere. So in humans, it has gone from the normal 46 to 92. During prophase, the chromosomes condense in the nucleus, and the spindle fibres form in the cytoplasm. During metaphase the nuclear membrane breaks apart, the spindle fibres attach to the chromosomes and the chromosomes line up at the equator of the cell. In anaphase, the spindle fibres shorten and the centromere divides, so that each chromosome becomes two separate chromatids. During telophase the nuclear membrane forms around each set of chromosomes. The chromosomes spread back out in their ‘new’ nucleus and the spindle fibres break down. In humans, each nucleus has the normal ‘46’ chromosomes again. The final stage is cytokinesis. The cell membrane pinches in to separate the two sets of chromatids into two identical daughter cells, with the same number of chromosomes as the parent - so 46 (or 23 pairs) in humans. JOIN US ON PATREON   / fuseschool   SUBSCRIBE to the FuseSchool YouTube channel for many more educational videos. Our teachers and animators come together to make fun & easy-to-understand videos in Chemistry, Biology, Physics, Maths & ICT. VISIT us at www.fuseschool.org, where all of our videos are carefully organised into topics and specific orders, and to see what else we have on offer. Comment, like and share with other learners. You can both ask and answer questions, and teachers will get back to you. These videos can be used in a flipped classroom model or as a revision aid. Find all of our Chemistry videos here:    • CHEMISTRY   Find all of our Biology videos here:    • BIOLOGY   Find all of our Physics videos here:    • PHYSICS   Find all of our Maths videos here:    • MATHS   Instagram:   / fuseschool   Facebook:   / fuseschool   Twitter:   / fuseschool   Access a deeper Learning Experience in the FuseSchool platform and app: www.fuseschool.org Follow us:    / fuseschool   Befriend us:   / fuseschool   This is an Open Educational Resource. If you would like to use the video, please contact us: [email protected]