PPT-Chromosome structure, function and implications for inheritance: mitosis

R r Source plantgeneticskaiskyotouacjp ATGGGCACTGCCACT A chromosome is a single DNA molecule complexed 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. 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. 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. R. r. Source: plant-genetics.kais.kyoto-u.ac.jp. ATGGGCACTGCCACT. A chromosome is a single DNA molecule complexed with histone proteins. DNA is highly compacted: DNA + histone proteins = . chromatin. Chromatin – the less tightly coiled DNA-protein complex. Centromere – the region of the chromosome that holds the two sister chromatids together during mitosis.. SEX CHROMOSOMES & AUTOSOMES. Sex chromosomes are chromosomes that determine the sex of an organism, and they may also carry genes for other characteristics. . a single . DNA molecule complexed with histone . proteins. DNA is organized within the nucleus as chromosomes. Each chromosome is comprised of subunits called nucleosomes: DNA + proteins. Chromosome numbering/naming. 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:. Nick Richards & Byron Haywood-Alexander. Mitosis/Meiosis. Cell cycle. S. DNA Synthesis. G2. Spindle formation. M. Mitosis. G1. Growth preparation. G0. Quiescence. X. X. Mitosis. Cellular division. The production of gametes (sex cells). Males = spermatogenesis in the testes. Females = oogenesis in the ovaries. Mitosis vs Meiosis. (Remember). . Diploid. Contain the full number (set) of chromosomes. 47 UNIT - II Inheritance and Variation CHAPTER 4 Multiple alleles Human blood groups Genetic control of Rh factor 4.4 Sex determination in human, insects and birds Sex linked inheritance Karyotypin 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. There are certain cells that do NOT divide: . Brain. Nerve. Muscle (after reaching adult size). Remember . IPMATC. (. I. . P. ray . M. ostly . A. t . T. he . C. hurch). Cell divides to make TWO identical cells. . Structure: pancreatic acinar cells. Identification: nucleus, nucleolus, heterochromatin. Heterochromatin. Nucleus. Nucleolus. Pancreas . 158. Pancreas . 158. 32409. Nuclei with . nucleoli. 32409.