The following is a link to your academic biology notes. Course outline, safety, academic honesty, formal lab format and command terms. Diploid cells have two versions of each chromosome homologous chromosome pairs, one inherited from mom and the other inherited from dad. Cell division meiosis lecture powerpoint keywords cell division lecture powerpoint, meiosis lecture powerpoint, cell division meiosis lecture ppt, free cell biology powerpoint. Bsci 124 lecture notes undergraduate program in plant biology, university of maryland lecture 8 mitosis cell division i. Cell reproduction cell division animals get layer of cells 2.
This article provides information about the mitosis. They remain in their unwound state, and are therefore invisible. Meiosis special cell division for sexual reproduction. The cell cycle, mitosis and meiosis university of leicester. Meiosis lecture notes mitosis vs meiosis mitosis converts a diploid cell into two diploid cells for growth and repair. Download this biol 112 class note to get exam ready in less time. Mitosis is a form of asexual reproduction, whereas meiosis is. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Students will use their lecture notes and their textbook to guide the creation of the clay model for their assigned phase of mitosis.
Kiran temple university fox school of business 17, course hero intern. In meiosis ii, a cell contains a single set of chromosomes. The objective of the lesson is for students to understand the process of cell division as it relates to contributing to the differentiation of cell types and maintaining complex organisms. Proper disjunction meiosis i nondisjunction meiosis ii nondisjunction a or b a and b. Once the students have completed their models, they will need develop a written narration that explains what is occurring in the cell during each phase. Mitosis results in the production of two genetically identical diploid cells, whereas meiosis produces four genetically different haploid cells. Meiosis i and meiosis ii each of which further proceeds in several stages. Org web experience team, please use our contact form. This is also referred to as the reduction division. References textbook pages 388, 393407, lab manual pages 116127 major characteristics. Meiosis involves two divisions of the nucleus meiosis i and meiosis ii. Meiosis objectives summarize the events that occur during meiosis. In many ways meiosis is very similar to mitosis, the stages are the same in general terms. Two spindle using divisions which reduce the chromosome number from diploid to haploid constitute meiosis.
Meiosis meiosis is the mechanism by which eukaryotic cells produce mature sex cells or gametes meiosis produces four haploid cells gametes meiosis involves partition of both cytoplasmic and nuclear structures meiosis consists of meiosis i and meiosis ii. Nov 19, 2014 this is a brief video of a lecture about the differences between mitosis and meiosis. However, in some types of single celled organisms, the offspring cells sti ck together and form a. Mitosis is a form of eukaryotic cell division that produces two daughter cells with the same genetic component as the parent cell. Two part cell division homologs separate sister chromatids separate meiosis i diploid haploid meiosis ii haploid homologous chromosomes separate in meiosis i sister chromatids same genes, same. Mar 14, 2017 between meiosis 1 and meiosis 2 is that during meiosis 1, chromosomal crossover occurs at the prophase 1, leading to the genetic recombination whereas no chromosomal cr oss over is identified. The cell cycle, mitosis and meiosis learning objective this learning material is about the life cycle of a cell and the series of stages by which genetic materials are duplicated and partitioned to produce two daughter cells with the same genetic component as the parent cell. Before meiosis begins, the dna in the original cell is replicated. Word document of an inclass activity given to students at the end of lecture. Students will use their brainstorming t chart from the opening section, the collaborative activity above, along with the mitosis lecture notes and meiosis lecture notes to gather evidence to create an essay that will compare and contrast the two cellular division processes. The growth and development of every living organism depends on the growth and multiplication of its cells. Mitosis and meiosis every organism, including you, begins as a single cell.
Each chromosome, however, still has its duplicated sister chromatid attached. Living things usually grow by producing more cells, rather than increasing the size of the cell. Bsci 124 lecture notes meiosis university of maryland. The key to distinguishing meiosis i vs meiosis ii nondisjunction is the centromerelinked marker, which will segregate as follows. There are related activities from class that correspond with this inf.
These cells divide once in approximately every 24 hours figure 10. Notes on introduction to meiosis notes on the divisions of meiosis notes on the importance of meiosis notes on the ultrastructure of meiosis. December 6th describe what happens during interphase identify steps of mitosis meiosis by picture and function explain the diseases that occur when mitosis and meiosis go wrong, such as cancer and nondisjunction cell reproduction. Preparing for meiosis preceded by interphase duplication of dna s phase of interphase of meiosis just like in mitosis m1 prophase meiosis. We also have a photo guide to this meiosis classroom activity. Bsci 124 lecture notes undergraduate program in plant biology, university of maryland lecture 9 meiosis and sexual reproduction i. C2 meiotic division occurs only in germ reproductive cells and consists of two successive phases, viz. Useful notes on gametogenesis spermatogenesis and oogenesis. Meiosis coverts a diploid germ cell into haploid gametes sperm and egg cells used.
Definition a process in the sexual cycle by which the chromosome number is reduced by 12 2n n. Chapter 1 the science of biology and text pp 190192 microscopes. In the tissue below, several stages of cell division can be seen. Powered by create your own unique website with customizable templates. Jan 04, 2016 lecture 2 mitosis and meiosis thomas mennella. We also acknowledge previous national science foundation support under grant numbers 1246120, 1525057, and 14739. The other important thing to note is that in meiosis one, during the process of metaphase, there is. Meiosislesson overview think about it as geneticists in the early 1900s applied mendels laws, they wondered where genes. December 6th describe what happens during interphase identify steps of mitosis meiosis by picture and function explain the diseases that occur when mitosis and meiosis go wrong, such as cancer and. The centrioles, a pair of cylindrical structures, are also.
Definition a process in the sexual cycle by which the chromosome. Share your knowledge share your word file share your pdf file share your ppt file. Each single celled or ganism reproduces by forming two new offspring cells. Hapter 10 national council of educational research and. Meiosis ii segregates the sister chromatids into separate cells. In unicellular organisms, cell division is the means of reproduction and by this process two or more new individuals arise from the mother cell. Start studying part 4 mitosis and meiosis lecture notes. The first division is reductional or disjunctional reducing the chromosome number from 2n to n. The main function of meiosis is to reduce the chromosome number in half.
Part 4 mitosis and meiosis lecture notes questions and. Relate crossingover, independent assortment, and random fertilization to genetic variation. Cell cycle and cell division ncert notes class 11 download in pdf. Students will get out a sheet of paper to record important details of the lecture notes highlighting the details of mitosis. Different modes of reproduction require different types of cell division a. Mitosis is a form of asexual reproduction, whereas meiosis is an early step in sexual reproduction.
Pdf bio103 topic 7 lecture notes meiosis shah tanjil. This is not the case for meiosis, which reduces the chromosome number by half. Your purchase includes 21 powerpoint slides in both. The meiosis notes and powerpoint presentation covers the following topics. Lecture notes, lectures 1112 meiosis and mitosis studocu.
Biol 1020 chapter 12 lecture notes 2 of 5 chapter 12. While we strive to provide the most comprehensive notes for as many high school textbooks as possible, there are certainly going to be some that we miss. Occurs with two sessions of divisions continuously but with no. Meiosis ii is the second major subdivision of meiosis. Proper disjunction meiosis i nondisjunction meiosis ii nondisjunction a or b a and b a and a or b and b. Biology 11a lecture notes test 2 chapter 8 cellular reproduction a.
Hapter 10 national council of educational research and training. Produces haploid 1n cells 1 copy of each chromosome. Mitosis and meiosis comparison lecture and notes youtube. The main function of meiosis is to produce gametes in an organism. Some organisms remain a single cell their entire lives. Your text is miller levine 2010 semester 1 chapters are listed in the order they are covered. Meiosis can be considered as two cell divisions known as meiosis i and meiosis ii, each of which can be considered as having prophase, metaphase, anaphase and telophase stages as in mitosis. Just as in mitosis, this begins with the doubling of the dna and chromosomes during the s stage of interphase, but unlike mitosis, meiosis consists of two divisions, thus producing four cells, each with half the original dna i.
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