PPT-11.4 Meiosis Vocabulary: Homologous, diploid, haploid, meiosis, tetrad, crossing-over

Key Concepts What happens during the process of meiosis How is meiosis different from mitosis Types of Reproduction Section 114 ASEXUAL SEXUAL 1 One Parent 2 Binary fission in prokaryotes or mitosis in eukaryotes. Organisms that reproduce sexually have specialized cells called gametes (sex cells). Gametes are the result of a type of cell division called meiosis. Diploid and haploid. Almost all human cells are . Each organism must inherit a single copy of every gene from each of its “parents.”. Gametes. are formed by a process that separates the two sets of genes so that each gamete ends up with just one set.. Homologous chromosomes . – identical chromosomes. . …same length, . centromere. , same staining pattern. . …exception…males sex chromosome. 1-22 . autosomes. . sex . chromsomes. Homologous chromosomes. Chapter 13. Vocabulary. heredity. variation. gene. gamete. somatic cell. asexual . vs. sexual reproduction. autosomes. sex chromosomes. allele. dominant . vs. recessive. diploid . vs. haploid. parental generation. 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. . Sexual Life Cycles. modes of reproduction. diploid/haploid and meiosis. meiosis I and meiosis II phases. key differences between mitosis and meiosis. variation in position of meiosis in life cycles. why sex?. 1. Introductory Vocabulary. 2. Heredity. .  . t. he . transmission of traits from one generation to the next . Variation. .  when o. ffspring . differ somewhat from their parents and . 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 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. Cell division / Asexual reproduction. Mitosis. produce cells with same information. identical daughter cells. exact copies. clones. same amount of DNA . same number of chromosomes. same genetic information. Interphase. Cytokinesis. Telophase. Anaphase. Metaphase. Prophase. Mitosis. Meiosis. What looks similar between mitosis and meiosis?. What looks different?. Vocabulary- Meiosis. Process of reduction . Essential Idea: . Meiosis produces genetically-varied, haploid cells needed for sexual reproduction. 3.3.1 One diploid nucleus divides by meiosis to produce four haploid nuclei. Meiosis. . is a process that divides . Gametes. are formed by a process that separates the two sets of genes so that each gamete ends up with just one set.. Chromosome Number. All organisms have different numbers of chromosomes.. A body cell in an adult fruit fly has 8 chromosomes: 4 from the fruit fly's male parent, and 4 from its female parent.. to . haploid. Making . Gametes. : Egg and Sperm. The cell cycle remains the same except…. . G1. S. G2. Division: . meiosis. . & cytokinesis. Meiosis Overview. Process of nuclear division that reduces the number of chromosomes in new cells to .