PPT-Chapter 12 Chromosomes and

Human Inheritance Disorders caused by individual genes dominant Individuals with the disorder only need 1 allele to have the disorder Huntingtons Disease Caused by a repeat of the sequence CAG . And 57375en 57375ere Were None meets the standard for Range of Reading and Level of Text Complexity for grade 8 Its structure pacing and universal appeal make it an appropriate reading choice for reluctant readers 57375e book also o57373ers students CELL DIVISION. TOPIC . 2 - 2015. CHROMOSOMES . & CELL DIVISION. Things to cover. Chromosomes. Karyotypes. inc. . chromosomal. . disorders. Cell. division:. Mitosis. Meiosis. & fertilisation. Essential idea: Chromosomes carry genes in a linear sequence that is shared by members of a species.. The . asian. rice (. Oryza. sativa. ) genome can be seen illustrated . above. . Rice possesses up 63,000 genes divided up between 12 chromosomes. Karyotypes. To find what makes us uniquely human, we have to explore the human genome. . A . genome. is the full set of genetic information that an organism carries in its DNA.. A study of any genome starts with chromosomes, the bundles of DNA and protein found in the nuclei of eukaryotic cells. . DNA. Nucleic Acid macromolecule. DNA is long, thin molecule & stores genetic . information called . chromatin. Cell division requires compact structures = . chromosomes. Chromosomes . DNA . (. eukaryotic cells) coil around . Phases of Mitosis and Meiosis. Unit 2. glossary. Chromatin - diffuse, long fibers of DNA with proteins attached . Single chromosomes - a chromosome which has not been duplicated (like ½ of an x). Duplicated chromosomes - a chromosome which has been duplicated (a complete X). in Chimps and Humans. are Horrendously Different. Paul Giem. Loma Linda, CA. Y Chromosomes in Chimps and Humans. The common chimp (Pan troglodytes) and human Y chromosomes are "horrendously different from each other", says David Page of the Whitehead Institute for Biomedical Research in Cambridge, Massachusetts. 1. 2 . 4. 8 . How many chromosomes are in the middle cell?. 1. 2 . 4. 8 . At what part of the cell cycle would you see a chromosome that looks like this. ?. G. 1. G. 2. . M. S . At what part of the cell cycle would you see a chromosome that looks like this? . Chromosomes carry genetic information. Chromosomes are wound up DNA. Diploid – Every body cell has 2 sets of chromosomes . n = number of chromosomes. Normal body cells have 2n (2 x n) chromosomes. 3.2.1. . Bacterial Chromosomes (prokaryotes). Most only have 1 chromosome.. Which means, it only contains a single copy of each gene (except during cell division when chromosomes are replicated).. Has circular DNA that contains all genes needed for basic life processes of the cell.. Ms. Diana and Ms. Su’ad. Karyotype Studies. The study of genetic material does not only involve the study of genes. It also involves whole chromosomes by using images of chromosomes stained during metaphase. . 22 pairs of autosomes. 1 pair of sex chromosomes. XX = Female, XY = Male. Karyotype - chromosomes are arranged according to shape and size. AN EXTRA COPY OF CHROMOSOME 21 CAUSES DOWN SYNDROME. This condition is called . Prepared by Rania Naoufal, M.D.. Learning Objectives. Chromosome structure. Chromatin. Chromatin exists in several alternative configurations, depending on what that particular stretch of DNA is doing. Genetic information is passed from one generation to the next on . chromosomes. .. Before cell division, each chromosome is duplicated, or copied.. C. hromosomes. Each chromosome consists of two identical .