MEIOSIS THE COUSIN OF MITOSIS REVIEW OF MITOSIS

MEIOSIS THE COUSIN OF MITOSIS

REVIEW OF MITOSIS: THE PURPOSE • Mitosis makes identical somatic clones via asexual reproduction • Unicellular organisms split to make 2 copies (via binary fission) • Multicellular organisms split to make 2 new daughter cells • Why do you think that only body cells and unicellular organisms (like bacteria) go through mitosis?

LET’S RUN THROUGH MITOSIS ONE MORE TIME • What are the steps involved in mitosis? • Prophase, prometaphse, metaphase, and telophase

DRAW A FLOW CHART OF MEIOSIS (INCLUDE THE COMPONENTS) • 2 N mom and 2 N dad each gives an N gamete 2 N zygote • So…. the pattern of meiosis when looking at ploidy is diploid, haploid, diploid

TERMS • What are homologous chromosomes? • A paternal and maternal chromosome that hold the same trait • Karyotype • A pair of homologous chromosomes • Locus or loci • Where the homologous chromosomes connect

HOT SEAT REVIEW OF YESTERDAY AND TODAY!

SISTER CHROMATIDS • One half of a chromosome. Each half is identical and is connected by a centromere

CENTROSOME • Two centrioles! Cylindrical organization of microtubules

KINETOCHORE • Where the mitotic spindles attach to the chromatids

HOMOLOGOUS CHROMOSOME • A chromosome from mom and dad that meet up at a loci due to similar genes

NUCLEAR ENVELOPE • Where the chromatin is held. Gets broken down in Mitosis

INTERPHASE • G 1, S and G 2 phases

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