REPRODUCTION/CELL DIVISION MEIOSIS

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Author:
datgrl_honey
ID:
115705
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REPRODUCTION/CELL DIVISION MEIOSIS
Updated:
2011-11-09 17:37:41
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REPRODUCTION CELL DIVISION MEIOSIS
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REPRODUCTION/CELL DIVISION MEIOSIS
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  1. SEXUAL REPRODUCTION
    IS DIFFERENT FROM MITOSIS BECAUSE IT REQUIRES FERTILIZATIONS OF AN EGG BY A SPERM
  2. MEIOSIS
    PROCESS THAT PRODUCES EGG AND SPERM
  3. SEXUAL REPRO. DEPENDSON
    MEIOSIS AND FERTILIZATION OF EGG BY A SPERM
  4. SEXUAL REPRO. PRODUCES OFF SPRING
    GENETICALLY DIFF FROM PARENTS AND FROM ONE ANOTHER

    • BECAUSE
    • CROSSING OVER
    • INDEPENDENT ASSORTMENT OF CHROMO PAIRS
    • RANDOM FERTILIZATION
  5. # OF HUMAN CHROMOSOMES
    • 46
    • 22PAIRS OF MATCHING HOMOLOGOUS CHROMOSOMES CALLED AUTO SOMES
    • TWO DIFFERENT SEX CHROMO X & Y

    (OTHER ORGANISMS HAVE DIFF #)
  6. HUMANS ARE DIPLOID ORGANISM
    CELLS CONTAIN 2 SETS OF CHROMOSOMES>1 FROM MOTHER 1 FROM FATHER
  7. HAPLOID
    THEIR GAMETES (EGG AND SPERM) ONLY HAVE 1 SET OF CHROMO
  8. MEIOSIS
    SEXUAL LIFE CYCLES INVOLVES ALTERNATION OF DIPLOID AND HAPLOID STAGES
  9. MEIOSIS PROCESS
    HOMOLOGOUS PAIR OF CHROMO DIPLOID PARENT

    • 1. CHROMO DUPLICATE
    • 2. HOMOLOGOUS CHROMO SEPERATE
    • 3. SISTER CHROMATID SEPERATE
  10. MEIOSIS
    HAPLOID GAMES ARE PRODUCED BY DIPLOID ORGANISM

    OCCCURS IN STES OR PHASES MEOSIS I AND II
  11. MEOSIS I
    HOMOLOGOUS CHROMOS SEPERATE
  12. INTERPHASE
    CHROMOSOMES FORM AND DUPLICATE
  13. PROPHASE I
    HOMOLOGOUS CHROMOS PAIR AND EXCHANGE SEGMENTS

    SITE OF CROSSING OVER
  14. METAPHASE
    TETRADS LINE UP

    MICROTUBULES ATTACHED TO CHROMOS
  15. ANAPHASE
    PAIRS OF HOMOLOGOUS CHROMOS SPLIT UP

    SISTER CHROMATIDS REMAIN ATTACHED
  16. TELO/CYTOKINESIS
    2 HAPLOID CELLS FORM CHROMO ARE STILL DOUBLED

    CLEAVAGE
  17. PROPHASE I SYNAPSE
    2 HOMOLOGS ARE JOINED TOGETHER BY A COMPLEX OF PROTEINS

    • FROMS TETRAD (BUNDLE OF FOUR)
    • CONSIST OF 2 HOMOLOGOUS CHROMO WITH 2 SISTER CHROMATIDS
  18. CROSSING OVER
    WHEN CHROMOS ARE IN THIS COMPLEX THEY CAN CROSS OVER

    INSCREASES GENETIC VARIATING BY MIXING AND MATCHING THE GENES ON THE HOMOLOGS
  19. GENETIC RECOMBINATION
    • WHEN HOMOLOGOUS CHROMOS ARE LINED UP SIDE BY SIDE
    • FATHERS AND MOTHERS DNA CAN MIX AND CHANGE PLACES ON THE CHROMOS
  20. MEIOSIS HUMAN MALES
    IS IN THE TESTIS PHROPHASE I TAKES ABOUT A WEEK
  21. MEIOSIS HUMAN FEMALES
    IN THE EGG CELLS PHROPHASE I BEGINS BEFORE BIRTH IN SOME EGGS CONTINUES FOR 50 YEARS/DEPENDING RELEASE IN MONTHLY OVARIAN CYCLE
  22. MEIOSIS II
    4 HAPLOID DAUGHTER CELLS ARE FORMED BY PULLING APART THE SISTER CHROMATIDS

    SISTER CHROMATIDS SEPERATE
  23. SEXUAL REPRODUCTION
    ALLOWS FOR DIVERSITY

    • RESULTS FROM
    • CROSSING OVER
    • INDEPENDENT ASSORTMENT
    • RANDOM FERTILIZATION
  24. RANDOM FERTILIZATION
    EGG CELL IS FETILIZED RAMDOMLY BY ONE SPERM LEADING TO GENETIC VARIENT IN ZYGOTE

    MATE CHOSEN AT RANDOM

    SPERM CELL THAT GETS TO THE EGG THIS IS RANDOM
  25. NONDISJUNCTION
    MEMEBERS OF A CHROMO PAIR FAIL TO SEPERATED DURING ANAPHASE

    GAMETES WITH AN INCORRECT NUMBER OF CHROMO ARE PRODUCE
  26. DOWN SYNDROME
    CONDITION WHERE AN INDIVIDUAL HAS AN EXTRA CHROMO 21

    • CALLED TRISOMY 21
    • CAN HAPPEN IN SEX CHROMOS
  27. KARYOTYPE
    AND ORDERLY ARRANGEMENT OF CHROMOSOMES

    HOMOLOGOUS CHROMOS ARE MATCHING PAIRS OF CHROMOS

    NODISJUNCTIVE PERSON HAS 3 COPIES OF CHROMO

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