PPT-Meiosis Sex Cell Formation

1 2 Sexual Reproduction Involves the production of sex cells gametes and the fusion of their nuclei fertilization producing a fertilized egg cell zygote Gametes Fertilization 3. Cell . Division. &. OUTCOME QUESTION(S):. S1-1-05:. What role do gametes play in reproduction?. Vocabulary & . Concepts.   . Genetic Diversity. Gamete Diploid Haploid . Meiosis . Homologous pair . Meiosis Terms . to Know:. Meiosis. : Cell division that produces gametes (sex cells/sperm & egg). These cells are used for sexual reproduction. They have . half . the number of chromosomes as the parent cell.. 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) Meiosis The formation of gametes (sex cells) Some Vocab Haploid ( n ): one set of chromosomes Reproductive cells are haploid (23 Chromosomes in humans) Eggs Sperm Diploid ( 2n ): 6.1 Chromosomes and Meiosis. Cells can be divided into 2 major groups:. Somatic (body): most of body tissue and organs. Germ: found in reproductive organs, develop into gametes. Gametes are sex cells – ova (eggs) & spermatozoa (sperm). CELL CYCLE. . The . sequence of events by which a cell duplicates its genome, synthesis the other constituents of the cell and eventually divides into two daughter cells. .. Phases of cell cycle :. •Interphase :. Illustrate the steps of meiosis. Describe the roles of crossing over and independent assortment in meiosis . Explain the importance of meiosis to living organisms. Words to know. Crossing over. - the process by which genetic material is exchanged by non-sister chromatids during prophase I of meiosis. INTERPHASE – G . FUNCTION. This . is the part of the cell cycle (and first part of interphase) where the cell is increasing in size (by synthesizing cytoplasmic components). It contains one copy of each chromosome in this stage (or 23 pairs of homologous chromosomes). . Vocabulary. Somatic Cell. Gamete. Homologous Chromosomes. Diploid Cells ( 2n ). Haploid Cells ( n ). Normal body cell. Sex cell – sperm or egg. Matching pairs of chromosomes. Cells that have homologous chromosomes (somatic cells). Good progress:. Describe how sexual. reproduction results in genetic variation. Draw diagrams to explain how gametes are formed in meiosis. . Outstanding progress:. Explain the number of chromosomes in the gametes during meiosis and fertilisation. . 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 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. Click here to see fertilization and chromosome numbers. Meiosis. =. Process . of nuclear division . t. hat reduces . the number of. chromosomes in new cells. to HALF the number in the. original cell..