Essays Tagged: "Meiosis"

Life-span development chap 3 notes

te (ovum) by a males gamate (sperm)1. Gamates - human reproductive cells/produced by the process of meiosis2. Meiosis - cell division in which pair of chromosomes separates3. Zygote - single cell form ...

(3 pages) 115 0 3.4 Sep/2002

Subjects: Social Science Essays > Psychology

Down Syndrome

Syndrome is the name for babies born with a disorderrelated to their chromosomes. It is caused when meiosis occursand an error occurs in the cells development. The reason forthis defect is often becau ... ent. The reason forthis defect is often because the parent is over 40 or for someother reason their meiosis is not 'Up to par.'The actual defect is an extra chromosome is developed duringcell developm ...

(2 pages) 84 0 3.0 Jan/1996

Subjects: Science Essays > Biology

Organism reproduction with an emphasis on meiotic cell disivion

iotic process of cell division the number of chromosomes in a cell reduces from diploid to haploid. Meiosis consists of two consecutive stages of cell division, called meiosis I and meiosis II. As a r ... onsists of two consecutive stages of cell division, called meiosis I and meiosis II. As a result of meiosis four daughter cells (gametes) are produced with only half as many chromosomes as the startin ...

(4 pages) 60 0 4.0 Feb/2003

Subjects: Science Essays > Biology

Genetics of Ascospore Color in Sordaria lab

enetic strains of different genotypes must be crossed from one another. Following fertilization and meiosis, the meiotic products can be analyzed as the ascomycete fungus, Sordaria fimicola. Sordaria ... ingular - ascus). Inside the asci, karyogamy occurs and combines the two parental genomes, and then meiosis forms genetically diverse ascospores. Eight ascospores can be found lined up in a row in the ...

(4 pages) 70 0 5.0 Aug/2003

Subjects: Science Essays > Biology

Biology notes on the "Phyla of Protists." This Phyla includes algea, protists, sponges, etc.

plasm called pseudopodia, from the Greek words pseudo, meaning "false," and podium, meaning "foot." Meiosis and sexual reproduction do not occur in amoebas. They reproduce by fission, simply dividing ...

(4 pages) 52 0 4.8 Aug/2003

Subjects: Science Essays > Biology

Bacterial Cell Replication and cell changes/stages summarized.

plate having formed down the middle and with two nuclei of the soon-to-be daughter cells reforming.Meiosis is a mode of cell replication that occurs only in the gonads (testis and ovary) of eukaryote ... of eukaryotes, in order to produce germ cells (sperm and egg cells, not 'germs' such as bacteria). Meiosis is a reduction division, where a cell's content of genetic material is reduced to form daugh ...

(4 pages) 59 1 2.8 Nov/2003

Subjects: Science Essays > Biology

Biology Revision.

*14.1 meiosis, Medelian inheritance*14.2 variation*14.3 population genetics*14.4 classification*14.5 ecosy ... NHERITANCE-With DIHYBRID INHERITANCE we are looking at the inheritance of a pair of characteristics.MeiosisLegend:Illustration of the process by which a single parent diploid cell (Both homologous chr ... hromosomes) divides to produce four daughter haploids cells (One homologous chromosome of the pair).Meiosis is the type of cell division by which germ cells (eggs and sperm) are produced. Meiosis invo ...

(15 pages) 183 0 4.5 Feb/2004

Subjects: Science Essays > Biology

Biology exam notes: Units on reproduction in plants and animals (sexual & assexual), mitosis & meiosis, growth and cell division

know as the zygote.·Zygote develops into a new individual.Events in the cycle of reproductionMeiosisMeiosis - the process of cell division that takes place in the gonads to produce haploid game ... ivides into two daughter cells·This phase is very short and is followed by a brief interphaseMeiosis 2Prophase 2·A new set of spindle fibres forms and the chromosomes begin to move towar ...

(10 pages) 98 1 3.8 Feb/2004

Subjects: Science Essays > Biology

Mitosis & Meiosis

Mitosis and meiosis have several similarities and differences. In mitosis, cells divide in four steps. First, th ... r cells. The cytoplasm then begins to divide, called cytokinesis.The difference between mitosis and meiosis I is the pairing up of homologous chromosomes in a process called synapsis in meiosis I. Bec ... a process called synapsis in meiosis I. Because of this, this drastically changes the processes of meiosis. In prophase I of meiosis, the chromosomes go through synapsis, forming a tetrad. Everything ...

(1 pages) 95 2 3.4 Mar/2004

Subjects: Science Essays > Biology > Human Biology

Biology Report of Fungus: Baker's Yeast

popular for genetics research because the ascospores they produce in each ascus are the products of meiosis. When yeast is nutritionally stressed, for example by deprivation of either a carbon source ... carbon source or a nitrogen source, diploid yeast will sporulate. The diploid nucleus goes through meiosis, producing four haploid nuclei, which are then incorporated into four stress-resistant ascos ...

(3 pages) 46 0 3.7 May/2004

Subjects: Science Essays > Biology

Mitosis and Meiosis

lls are similar to each other and also to the original mother cell.Helps in growth and body repairs.MEIOSISOccurs in reproductive cells.Consists of two nuclear divisions M-I and M-II.May take place on ...

(1 pages) 104 4 4.2 Jul/2004

Subjects: Science Essays > Biology > Human Biology

Biology 10 Notes on Genes, Chromosomes, Mendel's Laws, and Mitosis vs. Meiosis

pairs. Genetic Diversity: Variations in population. Different Characteristics. By product of meiosis. Mutation: Change in DNA. Caused by UV, radiation, carcinogens. Favourable or not is ... d up with the same DNA Same parents will have kids that have the same DNA Mitosis vs. Meiosis Mitosis occurs in almost all cells of the body. Meiosis occurs in cells giving rise t ...

(2 pages) 56 0 2.3 Sep/2004

Subjects: Science Essays > Biology

Chromosomes

XX, while a man has one of each, XY. The two Xs or the X and Y are separated from each other during meiosis - the cell divisions that form sex cells or gametes. All healthy eggs produced by a human ov ... sex chromosomes and males have XY.Two chromosomes of each pair are separated from each other during meiosis. Meiosis is a type of cell division used to make sperms or eggs.Gametes have single chromoso ...

(15 pages) 79 0 3.7 May/2005

Subjects: Science Essays

AP Biology Meiosis Essay

Meiosis is the process in sexually reproducing organisms where cells divide.The cells produced durin ... during meiosis have half the chromosome number as theoriginal cell. There are two cell divisions in meiosis, meiosis l and meiosisll. These cell divisions produce 4 hapolid daughter cells. Haploid cel ... 4 hapolid daughter cells. Haploid cells containonly one set of chromosomes, which is written as n. Meiosis consists of ninephases.In meiosis the interphase l the chromosomes replicate and the centros ...

(1 pages) 44 1 3.5 Jan/2006

Subjects: Science Essays > Biology

Genetic Disorders

omething in which the members of a pair of homologous chromosomes do not move apart properly during meiosis I, or in which sister chromatids fail to separate during meiosis II. In these cases, one gam ...

(3 pages) 43 2 4.5 Jun/2006

Subjects: Science Essays > Biology

Sordaria Lab

ss in which they fuse to form diploid zygotes." (Mertens,141) After asgonia appears on hyphae meiosis occurs, creating haploid ascospores contained in a linear order in sacs called ascus (asci). ... d in a linear order in sacs called ascus (asci). Recombination occurs forming the tetrad product of meiosis. Eight ascospores with different recombinants are then produced through mitosis. (handout) ...

(6 pages) 46 0 5.0 Nov/2001

Subjects: Science Essays > Biology

Genetics

Study Guide"”Mendel and Meiosis (+ some mitosis) 1. Be able to do a monohybrid cross.Example: Hh x hh 2. Know heterozygous v ... good choice to use? 8. Know/apply Mendel's Laws (dominance, segretation, independent assortment) 9. Meiosis (vs. mitosis): occurs in gametes (sex cells); makes haploid cells (only 23 chromosomes); Two ... ly 23 chromosomes); Two cell division stages make 4 daughter cells, homologues pair up, etc.Look at meiosis pictures. Know what's going on in each phase.10. What are Homologous pairs? What is crossing ...

(1 pages) 16 0 0.0 Nov/2001

Subjects: Science Essays > Biology

Mitosis And Meiosis Of Eukaryotic Organisms

finally develops from a single cell. There are two main types of cell division: (1) mitosis and (2) meiosis. (Balls 34) Most cells are produced by a process called mitosis. In mitosis, a cell divides ... osis. But before a sex cell matures, it goes through a special kind of cell division that is called meiosis. To understand the reason for this, we must understand something about heredity.We have seen ...

(4 pages) 49 1 4.3 Feb/2008

Subjects: Science Essays > Biology

Mitosis and Meiosis Mitosis:         Cells can be divided in unicellular

Mitosis and Meiosis Mitosis: Cells can be divided in unicellular organisms or in multicellular organisms. DNA co ... he dividing cells. The newly formed cells contain all the properties of complete, functioning cells.Meiosis: ~Prophase 1: Prophase 1 is the first step in meiosis. Prophase 1 in meiosis is very similar ... At the beginning of this stage, the cell chromosomes condense and become visible. In the S-phase of meiosis, each chromosome is replicated and in meiosis 1 they pair at centromeres to form bivalent. T ...

(6 pages) 1340 0 0.0 Feb/2008

Subjects: Science Essays > Biology

Higher Cognitive Thinking and Evolution: MGC8902

in a copy of the genome. One explanation of duplication is unequal crossover during Metaphase I in Meiosis I. (Appendix C) Unequal recombination means that half of the end gametes will end up having ... an another.Appendix C("Multicellular")This figure illustrates gene duplication as it might occur in Meiosis I during Metaphase I as a type of mutation. The usually equal recombination that occurs at t ...

(4 pages) 15 0 4.0 Oct/2008

Subjects: Science Essays > Biology