PPT-CHROMOSOME AND CELL DIVISION

CHROMOSOME AND CELL DIVISION Despite the diversity among cells three basic features are common to all cell types All cells have outer boundary an interior substance and a control region CELL STRUCTURE AND FUNCTION. Meiosis. Meiosis occurs in sexual reproduction when a diploid germ cell produces four haploid daughter cells that can mature to become gametes (sperm or egg).. Meiosis. . Goal: reduce genetic material by half. Obectives. Describe the result of meiotic division in terms of sexual reproduction. Discuss the structure of homologous chromosomes. Describe chromosomes in terms of ploidy. Distinguish between sexual and asexual reproduction. Part 1. Meiosis. Types of Cell Division. There are two types of normal cell division – mitosis and meiosis. . Both . types of cell division take place in eukaryotic . organisms. . Mitosis . is cell division which begins in . EQ: How do cells divide? . Cell Division . —. . process by which . a cell divides into 2 new cells. Why do cells need to divide? . Living things grow by producing more cells, NOT because each cell increases in size. Cell Division . —. . process by which a cell divides into . 2 new cells. Why do cells need to divide? . Living things . grow. by producing . more cells. , NOT because each cell increases in size. Figure 12.1b The functions of cell division: Growth and development. Figure 12.1c The functions of cell division: Tissue renewal. Figure 12.2 Eukaryotic chomosomes. Figure 19.0 Chromatin in a developing salamander ovum. Cell Division . —. . process by which a cell divides into . 2 new cells. Why do cells need to divide? . Living things . grow. by producing . more cells. , NOT because each cell increases in size. Organisms that reproduce sexually are generally diploid: each cell contains two sets of chromosomes—a maternal chromosome set and a paternal chromosome set—one inherited from each parent. . . Google Images. 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. . . During the cell cycle, a cell grows, prepares for division, and divides to form two identical daughter cells, each. of which then begins the cycle again.. The series of events that cells go through as they grow and divide.. ANA 205. 2. Differentiation. - development of a fertilized egg cell to form a complex, multicellular organism involving cellular replication, growth and progressive specialization for a variety of functions. . Acknowledgement. I would like to express special thank of gratitude to our respected principal madam, Mrs. . Kuljit. . Kaur. , for giving us this unique opportunity to express ourselves in a creative way. Ch. 10: Section 1 . Limits to Cell Growth/Size. DNA “Overload” – If a cell grows too large, its DNA could no longer serve the needs of the entire cell. Exchanging materials – if a cell is too large, is struggles to move enough nutrients & wastes throughout the cell and to the cell membrane. Medical Genetics Department/ICCMGR. Nov 2023. Mosaicism. Normal karyotype. What is the mosaicism?. Who is the responsible about it?. Types of mosaicism.. How it creates?. Normal female human karyotype.