http://www.mindbites.com/lesson/1463 for the full video.
http://www.mindbites.com/series/103 for a bundle of videos on mitosis, meiosis and the phases of each or http://www.mindbites.com/series/379 for a full set of videos on the ins and outs of cell reproduction including all of the aforementioned and more. Or, if you're really needing broader help with Biology, check out the full Biology course (390+ videos) at http://www.mindbites.com/series/441/.
To view all of the lessons on Biology that MindBites has to offer, head on over to our Biology Category Page: http://www.mindbites.com/category/22-biology/.
In this lesson, Professor Wolfe starts out with an overview of Meiosis and then discusses and explains the processes of both Meiosis I and Meiosis II. During the stages of meiosis I, homologous chromosomes pair and are segregated into separate cells. These stages include prophase I, metaphase I, anaphase I and telophase I. Professor Wolfe will explain what happens durring each of these different phases. He will focus specifically on what is happening with the cell's chromosomes during these phases. In prophase I, homologous chromosomes synapse and form tetrads. In metaphase I, homologous chromosomes organize and line up. In anaphase I, homologous chromosome pairs separate, and in telophase I, a cleavage furrow forms, creating two cells. Each created cell has one chromosome from each homologous pair.
During the stages of meiosis II, the doubled chromosomes are divided and move into separate cells as in mitosis. Meiosis II is also made up of stages (prophase II, metaphase II, anaphase II and telophase II), and you will also learn what happens in each of these phases, again with a focus on what is going on with the chromosomes. In prophase II, the nuclear envelope breaks down and spindle fibers form. In metaphase II, chromosomes line up on the metaphase plate. In anaphase II, chromatids separate, and in telophase II, haploid cells are eventually created. After meiosis II there are four cells, each containing the haploid genetic complement. This is the objective of Meiosis: to reduce the number of chromosomes by half (to form haploid cells) and to segregate homologous chromosomes.
Taught by Professor George Wolfe, this lesson was selected from a broader, comprehensive course, Biology. This course and others are available from Thinkwell, Inc. The full course can be found at http://www.thinkwell.com/student/product/biology. The full course covers evolution, ecology, inorganic and organic chemistry, cell biology, respiration, molecular genetics, photosynthesis, biotechnology, cell reproduction, Mendelian genetics and mutation, population genetics and mutation, animal systems and homeostasis, evolution of life on earth, and plant systems and homeostasis.
George Wolfe brings 30+ years of teaching and curriculum writing experience to Thinkwell Biology. His teaching career started in Zaire, Africa where he taught Biology, Chemistry, Political Economics, and Physical Education in the Peace Corps. Since then, he's taught in the Western NY region, spending the last 20 years in the Rochester City School District where he is the Director of the Loudoun Academy of Science.
Besides his teaching career, Mr. Wolfe has also been an Emmy-winning television host, fielding live questions for the PBS/WXXI production of Homework Hotline as well as writing and performing in "Football Physics" segments for the Buffalo Bills and the Discover Channel.
His contributions to education have been extensive, serving on multiple advisory boards including the Cornell Institute of Physics Teachers, the Cornell Institute of Biology Teachers and the Harvard-Smithsonian Center for Astrophysics SportSmarts curriculum project. He has authored several publications including "The Nasonia Project", a lab series built around the genetics and behaviors of a parasitic wasp.
He has received numerous awards throughout his teaching career including the NSTA Presidential Excellence Award, The National Association of Biology Teachers Outstanding Biology Teacher Award for New York State, The Shell Award for Outstanding Science Educator, and was recently inducted in the National Teaching Hall of Fame.
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Biology: Mitosis: The Phasesby Mindbitesdotcom34,006 views
Dude, you're amazing :l
Funny how i understood more from this guy than 3 months worth of biology classes -.-
Ad1gaJudy7797 1 year ago 11
Dr. Phil?
MrSuperHappyFun 3 months ago 10