PPT-Mitosis and Meiosis Chromosome:

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 numberingnaming. Take out a piece of paper and write for two minutes what makes you unique . . Human. Cat. Shrimp. Bean. Before Meiosis. Chromosome. number (haploid or diploid?. 46. ?. ?. ?. Number of pairs of homologous. Mrs. Stewart. Biology I . Stewarts Creek High School. Objectives:. Differentiate between the process of mitosis and meiosis. Demonstrate the movement of chromosomes throughout meiosis. Analyze how meiosis leads to genetic variation. Reproduction!!! 2 Types If both parents replicated cells using mitosis, a child would receive 46 chromosomes from dad & 46 from mom given a grand total of…? 92! (Way too many) So…if dad could give 23 + 23 from mom = 46! (Bingo 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. . 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. Where do you come from?. Sex: . Woman, XX. . Man, XY. Gender: Female Male. . Egg, Ovum Sperm. Fertilization – union of sperm an egg to produce zygote . Alteration of Chromosome Structure. Breakage of a chromosome can lead to four types of changes in chromosome structure:. Deletion . removes a chromosomal segment. Duplication . repeats a segment. Inversion . Gametes have half the number of chromosomes that body cells have.. You have body cells and gametes. . Body cells are also called somatic cells.. Germ cells develop into gametes.. Germ cells are located in the ovaries and testes.. 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. . Human. Cat. Shrimp. Bean. Before Meiosis. Chromosome. number (haploid or diploid?. 46. ?. ?. ?. Number of pairs of homologous. chromosomes. 23. ?. 127. ?. After Meiosis I. Chromosome number (haploid or diploid?). Abbas . Eleiwe. Embrylogy-L1. Embryology focus on essential events to understand principles of embryogenesis that can be used to . diagnose, care, & prevent. . birth defects. . . . germ cells. 1. MEIOSIS AND SEXUAL LIFE . CYCLES. Heredity. = Continuity of biological traits from one generation to the . next. Variation. = Inherited differences among individuals of the same . species. Genetics. Learning objective This learning material is about the life cycle of a cell and the series of stages by which genetic materials are duplicated and partitioned to produce two daughter cells with the Levels of Biological organization. Cells  Tissues. Tissues  Organs. Organs  Organ Systems. Organ Systems  Organisms . From zygote to Trillions of Cells. Zygote=Cell that forms when sperm and egg join.