AP Biology: Chapter 13 - Meiosis and Sexual Life Cycles Overview * The transmission of traits from one generation to the next is called inheritance‚ or heredity * Along with inherited similarity there is also variation * Genetics is the scientific study of heredity and hereditary variation I. 13.1 Offspring Acquire Genes from Parents By Inheriting Chromosomes A. Inheritance of Genes * Parents endow their offspring with coded information in the form of hereditary units
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AP LAB # 3: MITOSIS AND MEIOSIS Website to go for quizzes and activities: Print out the quizzes for mitosis and meiosis http://www.phschool.com/science/biology_place/labbench/ OVERVIEW Exercise 3A is a study of mitosis. You will simulate the stages of mitosis by using chromosome models.You will use prepared slides of onion root tips to study plant mitosis and to calculate the relative duration of the phases of mitosis in the meristem of root tissue. Prepared slides of the whitefish blastula
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More than one celled organisms grow by way of mitosis and the cytoplasmic division of body cells. On the other hand‚ meiosis occurs only in germ cells‚ which are put aside for the formation of gametes (sperm and egg). Reproduction by meiosis allows for species survival and it increases genetic variability. The process‚ during which the germ cells are generated is called meiosis. It represents nature’s solution to the problem of chromosome doubling that would occur‚ if two diploid cells‚ i.e.
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Comparing Mitosis and Meiosis Observe: 1. Organisms have a number of chromosomes in each of their body or somatic cells that is unique for that organism. This is called their diploid or 2n number. 2. Cells go through a cell cycle‚ whereby‚ much of the cycle does not include division‚ but at the end of this interphase in their cycle‚ they go through mitosis. 3. Cells replicate their DNA in the S phase of the cell cycle. 4. In the process of mitosis‚ cells replicate their DNA in the nucleus‚ form
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Meiosis and mitosis are both types of cell division. Cell division is the reproduction of cells‚ and requires the duplication of chromosomes. Mitosis takes place when the nucleus divides. Meiosis is a type of cell division that produces haploid gametes in diploid organisms. Mitosis and meiosis are two very different processes. While meiosis only requires the cell to divide twice‚ the cell only divides once during mitosis. This causes meiosis to produce four cells and mitosis to produce two cells
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Pouri‚ Nikole Period 1 1/14/12 Mitosis Lab Write-Up Purpose: The purpose of this lab is to understand the phases of mitosis through a hands on experience and not just textbook information. The objective is to visually determine each phase through a microscope with a clear understanding of what is happening. With this knowledge and this visual a picture is to be drawn as descriptive as possible for each phase. Materials: The materials needed are; 1) Microscope 2) A slide containing plant
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Mitosis: (onion roots) Root cells are good for observing mitosis; this is because they’re in the tip of the root which is an area of the plant that grows quickly. This results in more cells going through mitosis all at once‚ also allowing us to examine the different stages of mitosis. Stages: 1. Interphase: DNA replicates‚ but has not formed the condensed structure. They remain as loosely coiled chromatin. The nucleus is still intact. 2. Prophase: The DNA molecules progressively shorten
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to each other. Important for mitosis and meiosis. The relationship is that each chromosome consists of chromatin. Once replicated‚ a chromosome consists of two identical chromatids‚ which are attached to a section of the DNA called the centromere. 3. List the phases of mitosis and describe what is happening in each phase. Mitosis‚ results in identical cells. 46 chromosomes. It is important for: maintenance‚ repair‚ growth‚ and regeneration. The phases of mitosis are prophase‚ metaphase‚ anaphase
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Julie Lake November 8‚ 2012 BIO 111‚ C11- Online Villalpando‚ Shawn Lab 8 Title: Mitosis and Meiosis Exercise 1: Mitosis in Animal and Plant Cells Questions: A.) What is the purpose of mitosis? The purpose of mitosis is to create or produce more cells for a living organism. Mitosis occurs when genetic substance in the nucleus divides or separates in order to create more cells. Cytokinesis normally occurs next and the single cell develops into two separate cells. This same process continues
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Mitosis and meiosis are both important biological processes that happen within eukaryotic cells. These two processes are slightly different from one another‚ but have a lot of similarities. Before each of these processes can be performed‚ the cell first has to go through interphase. Interphase is considered the primer for mitosis or meiosis and consists of: G1‚ S‚ and G2 phases. These phases prepare the cell for either mitosis or meiosis by causing the cell to grow‚ copy the DNA‚ and copy the cell’s
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