PPT-The Chromosomal Basis of Inheritance

R r Source plantgeneticskaiskyotouacjp ATGGGCACTGCCACT A chromosome is a single DNA molecule forming a complex with histone proteins DNA is highly compacted DNA histone proteins chromatin. R. r. Source: plant-genetics.kais.kyoto-u.ac.jp. ATGGGCACTGCCACT. A chromosome is a single DNA molecule forming a complex with histone proteins. DNA is highly compacted: DNA + histone proteins = . chromatin. Abnormalities in Chromosomal Number. Abnormalities in Chromosomal Structure:. Rearrangements. Fragile Sites. Define:. nondisjunction. polyploidy. aneupoidy. trisomy. monosomy. Abnormalities in chromosomal number. The chromosomal basis of sex varies with the organism. Sex-linked genes have unique patterns of inheritance. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings. Genetics. 3. In human and other mammals, there are two varieties of sex chromosomes, . The chromosomal basis of sex varies with the organism. Sex-linked genes have unique patterns of inheritance. Copyright © 2002 Pearson Education, Inc., publishing as Benjamin Cummings. Genetics. 3. In human and other mammals, there are two varieties of sex chromosomes, . R. r. Source: plant-genetics.kais.kyoto-u.ac.jp. ATGGGCACTGCCACT. A chromosome is a single DNA molecule forming a complex with histone proteins. DNA is highly compacted: DNA histone proteins = . chromatin.  . Studying genetics . can be accomplished in part by . investigating the history of discoveries. that have lead to our . understanding of DNA and its role in gene expression and biological inheritance. 12. Why did the improvement of microscopy techniques in the late 1800s set the stage for the emergence of modern genetics? . It revealed new and unanticipated features of Mendel’s pea plant varieties. . 1. Chromosomal Theory of Inheritance. Theodor . Boveri. Walter Sutton. In 1902, Walter Sutton and Theodor . Boveri. developed the . Chromosome Theory of Inheritance. . . This theory basically states that Mendelian genes have a specific locus on the chromosome and that chromosomes undergo segregation and independent assortment during meiosis. . 12.1 Chromosomal Inheritance . 1. Genes are located on chromosomes; this is called the . chromosome theory of inheritance. .. 12.1 Chromosomal Inheritance. Chromosomes can be categorized as two types:. 1. A. Background. . 1. Genetics. . 1860’s—. Mendel. . proposed that discrete . inherited . factors . segregate . and assort . independently . during gamete . formation. . 2. Cytology. . What if it’s NOT just the number?. Gene Mutations. Damaged Chromosomes . –. sometimes a portion of a gene or chromosome is lost or damaged during meiosis. Gene mutation. – a mutation that affects the gene. For Premedical Student. 1438-1439H. Zoology Department. Lecture 24 : . Genetics. (. The Chromosomal Basis. of Inheritance). Objectives. Section B: Sex Chromosomes.. Some chromosomal systems of sex determination.. 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 2022-23 Asmaa A. Almukhtar .PHD . Lecturer . Medical Genetic Department. ICCMGR. 2023. Introduction to Chromosomal Analysis. Reading &Writing a Chromosomal Analysis Report. How to write the chromosomal analysis report?.