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REPRODUCTION/CELL DIVISION MEIOSIS
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SEXUAL REPRODUCTION
IS DIFFERENT FROM MITOSIS BECAUSE IT REQUIRES FERTILIZATIONS OF AN EGG BY A SPERM
MEIOSIS
PROCESS THAT PRODUCES EGG AND SPERM
SEXUAL REPRO. DEPENDSON
MEIOSIS AND FERTILIZATION OF EGG BY A SPERM
SEXUAL REPRO. PRODUCES OFF SPRING
GENETICALLY DIFF FROM PARENTS AND FROM ONE ANOTHER
BECAUSE
CROSSING OVER
INDEPENDENT ASSORTMENT OF CHROMO PAIRS
RANDOM FERTILIZATION
# OF HUMAN CHROMOSOMES
46
22PAIRS OF MATCHING HOMOLOGOUS CHROMOSOMES CALLED AUTO SOMES
TWO DIFFERENT SEX CHROMO X & Y
(OTHER ORGANISMS HAVE DIFF #)
HUMANS ARE DIPLOID ORGANISM
CELLS CONTAIN 2 SETS OF CHROMOSOMES>1 FROM MOTHER 1 FROM FATHER
HAPLOID
THEIR GAMETES (EGG AND SPERM) ONLY HAVE 1 SET OF CHROMO
MEIOSIS
SEXUAL LIFE CYCLES INVOLVES ALTERNATION OF DIPLOID AND HAPLOID STAGES
MEIOSIS PROCESS
HOMOLOGOUS PAIR OF CHROMO DIPLOID PARENT
1. CHROMO DUPLICATE
2. HOMOLOGOUS CHROMO SEPERATE
3. SISTER CHROMATID SEPERATE
MEIOSIS
HAPLOID GAMES ARE PRODUCED BY DIPLOID ORGANISM
OCCCURS IN STES OR PHASES MEOSIS I AND II
MEOSIS I
HOMOLOGOUS CHROMOS SEPERATE
INTERPHASE
CHROMOSOMES FORM AND DUPLICATE
PROPHASE I
HOMOLOGOUS CHROMOS PAIR AND EXCHANGE SEGMENTS
SITE OF CROSSING OVER
METAPHASE
TETRADS LINE UP
MICROTUBULES ATTACHED TO CHROMOS
ANAPHASE
PAIRS OF HOMOLOGOUS CHROMOS SPLIT UP
SISTER CHROMATIDS REMAIN ATTACHED
TELO/CYTOKINESIS
2 HAPLOID CELLS FORM CHROMO ARE STILL DOUBLED
CLEAVAGE
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
CROSSING OVER
WHEN CHROMOS ARE IN THIS COMPLEX THEY CAN CROSS OVER
INSCREASES GENETIC VARIATING BY MIXING AND MATCHING THE GENES ON THE HOMOLOGS
GENETIC RECOMBINATION
WHEN HOMOLOGOUS CHROMOS ARE LINED UP SIDE BY SIDE
FATHERS AND MOTHERS DNA CAN MIX AND CHANGE PLACES ON THE CHROMOS
MEIOSIS HUMAN MALES
IS IN THE TESTIS PHROPHASE I TAKES ABOUT A WEEK
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
MEIOSIS II
4 HAPLOID DAUGHTER CELLS ARE FORMED BY PULLING APART THE SISTER CHROMATIDS
SISTER CHROMATIDS SEPERATE
SEXUAL REPRODUCTION
ALLOWS FOR DIVERSITY
RESULTS FROM
CROSSING OVER
INDEPENDENT ASSORTMENT
RANDOM FERTILIZATION
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
NONDISJUNCTION
MEMEBERS OF A CHROMO PAIR FAIL TO SEPERATED DURING ANAPHASE
GAMETES WITH AN INCORRECT NUMBER OF CHROMO ARE PRODUCE
DOWN SYNDROME
CONDITION WHERE AN INDIVIDUAL HAS AN EXTRA CHROMO 21
CALLED TRISOMY 21
CAN HAPPEN IN SEX CHROMOS
KARYOTYPE
AND ORDERLY ARRANGEMENT OF CHROMOSOMES
HOMOLOGOUS CHROMOS ARE MATCHING PAIRS OF CHROMOS
NODISJUNCTIVE PERSON HAS 3 COPIES OF CHROMO
Author
datgrl_honey
ID
115705
Card Set
REPRODUCTION/CELL DIVISION MEIOSIS
Description
REPRODUCTION/CELL DIVISION MEIOSIS
Updated
2011-11-09T22:37:41Z
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