This is also referred to as the reduction division in which the chromosome content of the daughter cell is reduced to half of that of the mother cell. Distinguish between diploidy, heteroploidy and polyploidy name the phases of the cell cycle. If a truebreeding male plant with wrinkled seeds ww is crossed with a truebreeding female plant with round seeds ww, describe the seeds of the offspring. Obviously we studied more terms than this throughout our lectures and labs mitosis meiosis meiosis 1 meiosis 2 prophase prophase 1 prophase 2 synapsis independent assortment.
Pdf the study of meiosis regulation has always been carried out in parallel with mitotic cell cycle discoveries. The cell cycle, mitosis and meiosis university of leicester. Use what you learn to determine whether the following characteristics apply. Tetrads line up in metaphase 1 and sister chromatids orient. Understanding gametes, zygotes, and haploid diploid numbers. Powerpoint presentation of cell cycle and cell division.
As in mitotic division, meiosis i is preceded by replication of the dna content of the dividing cell. Meiosis is a specialised type of cell division, the principal function of which is to produce sporesgametes sperm and eggs in mammals that have the haploid number of chromosomes. A lot of you, at the end of that bacterial genetics lecture, said you werent quite. The vocabulary presented here is specific to your quiz.
If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Ifyouguessedthatitsapictureofacellundergoing celldivision,youareright. Which phase of the cell cycle would you expect triploid cells to be unable to complete. What cellular process allows multicellular single cell. How do the genetic contents of cells resulting from mitosis and meiosis differ. Processes of cell division, differentiation, and specialization read this chapter to learn about mitosis meiosis gametogenesis embryogenesis mitosis mitosis is the process of normal cell division in eukaryotic cells. Meiosis questions and study guide quizlet flashcards by.
Production of haploid gametes requires segregation of homologous chromosomes in the first meiotic division and of sister chromatids in the. Choose from 500 different sets of meiosis 1 phases flashcards on quizlet. We will discuss the interrelated processes of chromosome. Chapter 5 the cell cycle, mitosis, and meiosis whatdoyouthinkthiscolorfulpictureshows.
Ppt meiosis powerpoint presentation free to download id. Starts with 46 chromosomes in humans and forms haploid cells of 23 chromosomes. The four daughter cells will be haploid, or containing half the number of chromosomes as the parent cell. Identification of the meiotic toolkit in diatoms and exploration of.
Describe a similarity and a difference between meiosis i and meiosis ii. In this topic we will examine a second list, describe. Activity notes meiosis tutorial a cardbased tutorial that allows students to explore the role of meiosis in the generation of genetic diversity using an example involving two pairs of homologous chromosomes. Afterward, view the meiosis i and meiosis ii animations. 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. 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.
Cells alive meiosis phase worksheet answers pdf best of all, they are entirely free to find, use and download, so there is no cost or stress at all. Visit the the reproduction portion of the site and read all of the material on each page. 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. Chapter 7 processes of cell division, differentiation, and. Define the meaning of chromosomes state how a kayotype is constucted. Mitotic cell division is equational in nature while meiosis is a reduction division. Theres an article thats on the financial pages about investors reconsidering gene therapy, and startups funded as technology evolves. You must include what crossing over is, and where it takes place you must include one disorder that results from problems with meiosis and how it happens. The difference between the two processes is that mitosis. Thus meiosis is of considerable interest, both at the scientific level and at the level of natural human curiosity about sexual reproduction. Download englishus transcript pdf just wanted to begin today by pointing out a couple of articles from todays boston globe. Meiosis 1 the different phases of meiosis 1 cell division.
It occurs in two stages of the nuclear and cellular division as meiosis i and meiosis ii. We will focus on oocyte meiosis, as later stages of prophase in oocytes are cytologically more accessible than during spermatocyte meiosis. Chapter 5 the cell cycle, mitosis, and meiosis worksheets. In preparation for the first meiotic division, homologous chromosomes pair and synapse. If the file has been modified from its original state, some details may not fully reflect the modified file. This file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Meiosis occurs only at the final division of gamete maturation. Ppt meiosis powerpoint presentation free to download. The salient features of meiotic division that make it different from mitosis are as follows. Jun 20, 2016 this file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. The obtained plants produce functional diploid gametes that are genetically identical to their mother. Meiosis powerpoint free download as powerpoint presentation.
Students will analyze the nature of the relationships between structures and functions in living cells. Prophase i, metaphase i, anaphase i, and telophase i. While these include the majority of known meiosisrelated genes, several. Describe the behavior of chromosomes during meiosis describe cellular events during meiosis explain the di erences between meiosis and. 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. As in mitotic division, meiosis i is preceded by replication of. Mitosis and meiosis indiana university bloomington. To identify the phases of mitosis to learn what happens in each phase pictures in this presentation are courtesy of wikimedia commons thursday, september 24, 2009 mitosis has four phases, we will go through each phase. Thompson seedless grapes the thompson seedless grape is triploid, with three copies of each chromosome. The process of meiosis openstax college this work is produced by the connexions project and licensed under the creative commons attribution license 3. This reduction in genetic content is accomplished during a specialized cell division called meiosis, in which two rounds of chromosome segregation follow a single. Jelly fish and coral anaphase 1 meiosis 1 telophase 1 anaphase i telophase 1 two daughter cells are formed. Occurs with two sessions of divisions continuously but with no. Meiosis i and meiosis ii each of which further proceeds in several stages.
Mitosis and meiosis how do eukaryotic cells divide to produce genetically identical cells or to produce gametes with half the normal dna. Sister chromatid cohesion on chromosome arms is essential for the segregation of homolo gous chromosomes during meiosis i while it is. Alfred cuschieri university of malta department of anatomy objectives by the end of the session the student shoud be able to. They absorb dye very easily, allowing them to be seen under a microscope, and were discovered in 1888. Chromosomes and meiosis chromosomes are long, threadlike structures that form part of the chromatin network in the nuclei of cells. Asexual reproduction when dna is contributed by 1 parent produces offspring that are genetically identical. Another difference is that after the first meiotic division, the cells do not reenter interphase and dna is not replicated. Mitosis is the process in which the nucleus of the cell divides. Thus meiosis is of considerable interest, both at the scientific level and at the level of. Number of chromosomes a human cell has 46 total or 23 pairs of chromosomes. Join our community just now to flow with the file meiosis and make our shared file collection even more complete and exciting. If the file has been modified from its original state, some details may not fully reflect the. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of.
It occurs in most cells with the exception of gametes as well as mature nerve and muscle cells in animals. Mitosis is a form of eukaryotic cell division that produces two daughter cells with the same genetic component as the parent cell. In metaphase 1 of meiosis, bivalents orient at the metaphase plate and homologous are paired. There are two sets of 2 similar homologous chromosomes. You must include interphase and all stages of meiosis. Meiosis is the key process underlying sexual reproduction in eukaryotes, occurring in singlecelled eukaryotes and in most multicellular eukaryotes including animals and most plants. In addition, we will see how the 2 types of eukaryotic cell division, mitosis and meiosis, are involved in. Meiosisspecific prophaselike pathway controls cleavage. They are made up of a strand of dna wound around histones proteins. Background one of the characteristics of living things is the ability to replicate and pass on genetic information to the next generation. Meiosis initiated continuously in a mitotically dividing stem cell population 4 gametes produced meiosis meiosis completed in days or weeks meiosis and di. This is a diploid cell in metaphase and anaphase of mitosis. Bohrgasse 9, 1030, vienna, austria 3 mrc clinical sciences centre, imperial college, du cane road. Meiosis is called cell reduction because there is a reduction decrease in the number of chromosomes from the original parent cell.
On the meiosis tutorial page, click on reproduction and answer the following questions or filling in the blanks. Scribd is the worlds largest social reading and publishing site. Learn meiosis 1 phases with free interactive flashcards. Go to the university of arizonas biology project meiosis tutorial website. If a diploid cell containing 28 chromosomes undergoes meiosis, how many chromosomes will each daughter cell have.
The tutorial assumes that students are already familiar with the stages of meiosis. This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. Jul 18, 2011 powerpoint presentation of cell cycle and cell division. A free powerpoint ppt presentation displayed as a flash slide show on id. Mitosis, meiosis and the cell cycle university of malta.