Scientific Method and
Stages of Mitosis in Onion Root tip cells. Page 6. Different stages of Mitosis. Page 7. Interphase. Prophase. Metaphase. Anaphase. Telophase. Page 8
Mitosis Review - SHORT ANSWER: 1) Human somatic cells have _46___ chromosomes. 2) How many stages are in mitosis? _4 - PMAT (5 if you include prometaphase)
Cell Cycle Mitosis & Meiosis Study Guide PMAT. Occurs once in mitosis
I can describe why mitosis (and meiosis) are important for life I can predict the environmental factors that can affect mitosis ... Mitosis: P-M-A-T.
Remember mitosis? (I)PMAT… • In meiosis each phase occurs twice. • Meiosis I: Prophase I
Mitosis (PMAT). Role of Mitosis Meiosis is a type of cell division ... Mitosis. Meiosis. Same number of chromosomes in daughter and parent cell.
MEIOSIS P-M-A-T (x2). PROPHASE I: Chromosomes condense together and become more visible. The homologous chromosomes line up together.
Meiosis is part of the sexual process because gametes (sperm eggs) have one half the chromosomes as diploid (2N) individuals. Phases of Meiosis. There are two
meiosis reproduction Review: Asexual vs Sexual Reproduction Asexual Sexual and prokaryotes Eukaryotes Cell division: or binary fission Cell division: Steps: PMAT ( division) Steps: PMAT I and PMAT II (divisions) No gametes Gametes Diploid to cells (full number of chromosomes)
Meiosis is part of the sexual process because gametes (sperm eggs) have one half the chromosomes as diploid (2N) individuals Phases of Meiosis There are two divisions in meiosis; the first division is meiosis I: the number of cells is doubled but the number of chromosomes is not
MEIOSIS: cell division in which daughter cells receive only ½ of the chromosomes of the parent cell RESULT: formation of gametes! occurs only in reproductive tissues male = testesfemale = ovaries Behavior of Chromosome Sets in the Human Life Cycle -OVERVIEW At sexual maturity the ovaries and testes produce haploid gametes
• Gametes are produced by the process of meiosis • A series of cell divisions (with similar phases as mitosis – PMAT) • Meiosis starts with one diploid cell and creates four haploid gametes • The term for creating gametes is gametogenesis • The term for creating eggs is oogenesis
5 Meiosis does PMAT twice! That means there is a prophase I and a prophase II There is a metaphase I and a metaphase II Etc If the cartoon below has chromosomes in the middle of the cell how would you know whether it was in metaphase I or metaphase II? 6 Meiosis does not always occur without any difficulties Describe what occurs during
During prophase I and metaphase I of meiosis a chromosome consists of a tetrad (4 chromatids or 4 DNA molecules) and is reduced to two chromatids (2 DNA molecules) by the time metaphase II occurs metaphase II telophase II S phase prophase I and metaphase I telophase I 2 3