The Cell Cycle
The Cell Cycle Biol 120-101
Popular in Principles of Biology
Popular in Biological Sciences
verified elite notetaker
This 3 page Class Notes was uploaded by Madison Scanlon on Monday September 28, 2015. The Class Notes belongs to Biol 120-101 at Towson University taught by Lauren Kuta in Fall 2015. Since its upload, it has received 50 views. For similar materials see Principles of Biology in Biological Sciences at Towson University.
Reviews for The Cell Cycle
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 09/28/15
The Cell Cvcle Mitosis 0 Cycle designed to replace old damaged or dead cells 0 It produces two cells that are exactly the same The Cell Cycle gt Interphase stage 1 O Resting stage in cell cycle 0 Most of the cells life is in this stage 0 Cell does its normal job may grow to size amp replicate 0 Three stages are G1SG2 gt Prophase stage 2 O Longest stage 0 DNA replicates during beginning of this stage 0 Nuclear membrane breaks down 0 Centrioles amp spindle fibers appear 0 DNA Chromosomes gt Metaphase stage 3amp4 0 Cell prepares to divide its DNA chromosomes 0 The chromosomes line up at the cell equator O Spindle fiber attaches to the centromere of each chromosome gt Anaphase stage 5 0 Pressure on spindle fibers due to centrioles O Chromosomes begin to tear apart in opposite directions gt Telophase stage 6 0 Prophase reversed I Chromosomes break back down into chromatin I Spindle fibers amp centrioles disappear I Two new nucleus begin to form I Preparing to divide gt Cytokinesis stage 7 0 Final stage full split of the cell 0 Animal cells two brand new identical cells that go separate ways 0 Plant cells never really separates fully cell plate forms amp serves as a divider Here s a way to help you remember the order of the stagesl Insects Play Music Around Toy Cars If this doesn t help try to make your own Cancer 0 When body looses control of mitosis 0 A tumor is a group of cells that constantly are dividing amp producing a mass that can damage organs 0 Cancer can be caused by genetics or the environment 0 Diet 0 Lifestyle 0 Air quality Preventing Cancer 0 Not always preventable 0 Understand your genetics participate in early diagnostics to avoid cancerous cells or catch them 0 Reduce environmental factors Smoking amp sun exposer Meiosis A complimentarv process 0 Similar to mitosis but different results 0 Produces 4 cells which are not identical amp only have a single set of chromosomes The Meiosis Cycle 0 Undergoes division TWICE in order to produce 4 CELLS 0 NO INTERPHASE so DNA does not duplicate Purpose of Meiosis 0 To make gametes egg ampsperm cells 0 Testies of men Ovaries of women 0 Cell begin production during puberty Crossing over 0 During prophase 1 crossover occurs 0 Homologous matching chromosomes get very close to one another amp exchange pieces of genetic material DNA 0 Every gamete produced has a unique combo of genes that never existed before 0 Fraternal siblings have the same parents but are not exactly the same Spermatogenesis vs Oogenesis 0 Sperm amp egg production both employ meiosis but the similarity ends there 0 Men produce billions of sperm in a month amp women will only usually produce one egg 0 Complementary processes end products produce babies Guy Quantity over Quality 0 Testies begin to produce sperm around age 12 puberty 0 Testies can generate millions of sperm in a given day produces sperm from puberty till death 0 Sperm produced in large numbers but very little care is given to new cells amp mistakes amp damaged cells are common even in healthy men Ladies All about the Quality 0 Produce a single fertile egg a month 0 All the eggs a women has are created while in their mothers womb but they don t begin to mature until around age 10 puberty 0 1 single large cell is produced by 1 ovary a month along with 3 polar bodies small fragments of egg with a set of chromosomes each Eggamp Sperm work together 0 Egg amp sperm are designed to work together They each only have one set of chromosomes 1n haploid 0 Sperm amp egg meet the two fuse amp sperm chromosomes are dumped into the egg resulting in a zygote or fertilized egg with two sets of chromosomes 2n diploid How are twins made 0 Identical twins or fraternal O Identical twins are produced when the zygote splits soon after fertilization amp two embryos develop from each half 0 Fraternal twins are produced from two different eggs fertilized by two different sperm Only thing that is the same is their age Sex determination of the Fetus 0 Two sex chromosomes 0 Women XX I A women gives a child a single X chromosome 0 Men XY I Sperm cells can either carry an X or Y chromosome 0 Men create daughters if his sperm was carrying an X when it met the egg amp a son if his sperm was carrying a Y
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'