PPT-CHAPTER 15 THE CHROMOSOMAL BASIS OF INHERITANCE

1 A Background 1 Genetics 1860s Mendel proposed that discrete inherited factors segregate and assort independently during gamete formation 2 Cytology . 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, . 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. 1. Inheritance. Inheritance. allows a software developer to derive a new class from an existing one. The existing class is called the . parent class,. or . superclass. , or . base class. The derived class is called the . 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. OVERVIEW. 2. By the 1940’s, scientists knew that chromosomes carried hereditary material and consisted of DNA and protein.. Most thought that protein was the genetic material because:. -proteins were macromolecules. 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?.