PPT-Meiosis forms variable gametes

CfE Advanced Higher Biology Unit 2 Organisms and Evolution 2bii Meiosis forms variable gametes Terminology 4 Sexual life cycle of animals 1 Meiosis an overview 1 Meiosis I 4. (Body Cells). (Sex Cells). Examples of . somatic (body) cells:. spleen, kidney, eyeball. . The DNA in these cells are NOT passed on to your offspring!. Examples of . gametes (sex cells): . ova/egg and sperm. Meiosis. Meiosis is the cell division which produces the . sex cells . or . gametes. .. Meiosis occurs in the cells of the . reproductive organs. :. Sperm cells – testes. Ova (eggs) – ovaries. Pollen - anthers. 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. Sexual Life Cycles. Which of the following transmits genes from both parents to child, or from one generation of a family to another?. DNA. gametes. somatic cells. mitosis. nucleotides. Which of the following transmits genes from both parents to child, or from one generation of a family to another?. gametes. Meiosis produces gametes. . Meiosis was first observed by the Belgian cytologist Pierre-Joseph van Beneden in 1887. 60 years before we knew that DNA contained the genetic material. Gametes. Mendel’s Laws. May 17, 2013. Athens, GA. Heredity Group AKA. “The . Chiasmatics. ”. Unit Context. Introductory level majors biology. 2-3 Weeks, OR As long as it takes to achieve the learning objectives. Alleles segregate during meiosis allowing new combinations to be formed by the fusion of gametes. . Understandings:. One diploid nucleus divides by meiosis to produce four haploid nuclei. . The halving of the chromosome number allows a sexual life cycle with fusion of gametes. . Not all cells in the organism reproduce through mitosis. If the organism reproduces sexually, then it needs special cells. Gametes = egg or sperm cells. Meiosis. Meiosis. Type of cell division by which gametes (eggs and sperm) are produced.. Before we start genetics, let's review the process of what makes us all look different compared to our siblings, family, and classmates!. Sexual Reproduction. Sexual reproduction creates genetic variability. That is why we all look different and you look different from your siblings! . 10.2 – Meiosis Sexual Reproduction Function: creates gametes (sperm, egg, pollen) for sexual reproduction . Meiosis: Cell division for sexual reproduction. Males - testes Females - ovaries Sex Cells Meiosis (Ch 11.4) Background Chromosome = package form of DNA in a cell Genes = genetically inherited traits Genes normally have two alleles per gene (there are some exceptions like ABO blood type) . 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?). Defined. : Gametes from two separate parents unite. Meiosis: Diploid (2n) to haploid (n) cells . Mechanism that allows for . genetic diversity. Many eukaryotes reproduce in this manner. Plants, animals and fungi. Advanced Higher Biology. Miss A Aitken. National 5 Re-Cap. Haploid: One set of chromosomes – 23 . All gametes (sex cells – sperm and egg) are haploid. Diploid: Two sets of chromosomes – 46 (or 23 pairs).