PPT-Lecture 2: DNA Structure and Chromosome Structure

Chapters 6 and 3 Presented by Dr Laurie M Erickson Chair of the Department of Health Sciences Blitstein Institute of Hebrew Theological College Chicago IL USA 1 61 Genome Size Genome. chrmosomes. A . chromosome.  is an organized structure of . DNA.  and . protein.  found in . cells. . It is a single piece of coiled DNA containing many . genes. , . regulatory elements.  and . — Lecture II. Dr. Steven J. Pittler. VH 375B. Office 4-6744. Cell 612-9720. Suggested Reading: Lewis . 2nd . Edition. Chapter . on . Chromosomes. Chromosomes. Structures that consists primarily of DNA and proteins that are duplicated and transmitted during mitosis or meiosis. SUBMITTED BY:. ALABADO, SHEENA ANN C.. LUISTRO, JANELLE. What is a chromosome?. A chromosome is…. A very long DNA molecule and associated proteins that carries portions of the hereditary information of an organism.. DNA damage DNA gets damaged a lot ! DNA damage DNA gets damaged a lot! >200,000 events/human cell/day DNA damage Occurs 2 ways 1) spontaneously 2) mutagens : damage DNA Transposons Discovered by Barbara McClintock 6c. Chromosome Mutations. Learning Intentions. By the end of this topic you should be able to:. (c) Chromosome structure mutations. Define ‘chromosome structure mutation’ . Name 4 chromosome structure mutations . Olivia Fordiani. The content of this video, as well as the thoughts, views, and opinions expressed herein belong solely to the creator and do not necessarily reflect the views of FamilySearch International and RootsTech.. McClintock, (1902–1992). An . American scientist and . cytogeneticist.  who was awarded the 1983 . Nobel Prize in . Physiology.. She received her . Ph.D. from.  . Cornell University.  in . 1927. She studied . Prokaryotic and Eukaryotic Chromosomes Organization . Dr.Sawsan. . Sajid. . - The . term chromosome comes from the Greek words for color (. chroma. ) and body (soma). Scientists gave this name to chromosomes because they are cell structures, or bodies, that are strongly stained by some colorful dyes used in research. What is a Chromosome?. A chromosome is a special structure made up of DNA and proteins. DNA is what make us all unique.. The proteins are called histones. They act as spools so the DNA can wrap around it, which is why chromosomes have a peculiar X shape.. evolutionpolyploidization cause polyploidy. E.g.:�(a) 2 sperm + 1 egg -- 3N(b) Failure of anaphase occur), chromosomalabnormalities or aberrations (not strictly applicable because sometimes ! The recent cytological findings have also condemned the view that chromosomes have pellicle, matrix and chromonemata.A. Nucleolus organizer B. Chromosome C. NucleolusThe structure of chromosomes and g Gene. – DNA is a large molecule broken down into hereditary units called genes. DNA is organized & packaged into chromosomes. Chromosome. – DNA wound or coiled tightly around proteins (histones. Euploid. Have the . normal. chromosome number. Polyploid. A cell with . extra sets. of chromosomes. Ex: triploid (3n). Aneuploid. Cells missing a single chromosome or having an extra chromosome. Alterations in Chromosome Number. Chromosome. Chromosome . means: . chroma. - colour; some - body) . E. . . Strasburger. in 1875 discovered thread-like structures which appeared during cell . division. Waldeyer. coined the term chromosome first time in 1888. .