PPT-How many chromosomes? All body cells have TWO sets of chromosomes =

diploid Sex cells gametesgerm cells have only one set of chromosomes haploid That means when fertilization occurs the new individual will have the correct number of chromosomes. EQ:. What is the importance of meiosis in providing genetic variation?. . SPECIALIZED CELLS. You have many specialized cells in your body that can be divided into two groups. . 1. . . SOMATIC. = body cells; make up most of your . Section 6.1. 1. Objectives. SWBAT differentiate between body cells and gametes.. SWBAT compare and contrast autosomes and sex chromosomes.. 2. Vocabulary. Somatic cell. Gamete . Homologous chromosome. CELL DIVISION. TOPIC . 2 - 2015. CHROMOSOMES . & CELL DIVISION. Things to cover. Chromosomes. Karyotypes. inc. . chromosomal. . disorders. Cell. division:. Mitosis. Meiosis. & fertilisation. Chromosome number. Phases of meiosis. Meiosis and genetics. Gamete formation. Comparing mitosis and meiosis. Chromosome number. A cell in adult . drosphilia. (fruit fly) has 8 chromosomes, 4 of which came from the fly’s male parent, and 4 of which came from the fly’s female parent.. chrmosomes. A . chromosome.  is an organized structure of . DNA.  and . protein.  found in . cells. . It is a single piece of coiled DNA containing many . genes. , . regulatory elements.  and . DNA. Nucleic Acid macromolecule. DNA is long, thin molecule & stores genetic . information called . chromatin. Cell division requires compact structures = . chromosomes. Chromosomes . DNA . (. eukaryotic cells) coil around . MEIOSIS. Parents can produce many types of offspring . Families will have resemblances, but no two are exactly alike. Every cell has a nucleus.     Every nucleus has chromosomes. The number of chromosomes depends on the species. Phases of Mitosis and Meiosis. Unit 2. glossary. Chromatin - diffuse, long fibers of DNA with proteins attached . Single chromosomes - a chromosome which has not been duplicated (like ½ of an x). Duplicated chromosomes - a chromosome which has been duplicated (a complete X). Chromosomes carry genetic information. Chromosomes are wound up DNA. Diploid – Every body cell has 2 sets of chromosomes . n = number of chromosomes. Normal body cells have 2n (2 x n) chromosomes. .. DNA . in cells is usually spread out so transcription can take place.. During . cell division, . chromosomes. form. .. Chromosomes are . DNA. and protein (. histones. ) coiled into a rod.. After DNA replicates, two . Chapter 4: Animal Growth and Heredity. Vocabulary. Life cycle- the stages that a living thing passes through as it grows and changes.. Mitosis- the process by which most cells divide.. Chromosome- A threadlike structure in the nucleus, made up of DNA.. Haploid. Chromosome. Chromatid. Chromatin. Crossing Over. Tetrad. Gene –A segment of genetic information on a chromosome. Codes for a specific . characteristic. Allele – A specific form of a gene. If YOU are human, then YOUR cells have 46 chromosomes and your parents’ cells each have 46 chromosomes. Agreed? If you get DNA from both your parents then why wouldn’t you end up with 92 chromosomes? . 1. 2. 3. 4. Bellwork. : Identify which “PHASE” the cells are going through and DRAW that cell. . Prepare your Journals for Cornell Notes. Page . 47. Title: Meiosis. Essential Question:. . What is meiosis and how is it different than mitosis?.