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Campbell Biology 10th Edition: Ch. 13 Flashcards

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1777401177GenesHereditary units, program our genetic traits0
1777401178DNALanguage of genes1
1777401179GametesReproductive cells are the vesicles from one generation to the next2
1777401180LocusThe genes place on each chromosome3
1777401181Asexual ReprodutionResults in the exact copies of themselves, sole parent passes all of its genes to its offspring without the fusion of gametes(sex cells)4
1777401182Sexual ReproductionGive rise to offspring that have unique combination of genes from two parents; not exact replicas like asexual5
1777401183Homologous ChromosomesBoth arms of each chromosome containing the genes controlling the same trait6
177740118423# of chromosomes in a set7
1777401185Haploid CellsHas a single set of chromosomes8
1777401186MeiosisDivides the number of chromosomes in half ending with four haploid chromatids9
1777401187Stages of Meiosis1. Single pairs of homologs in a diploid cell 2. Both members of the pair are duplicated creating sister chromatids 3. The copies are sorted into four haploid daughter cells10
1777401188Sister Chromatid CohesionSister chromatids closely associated all along their lengths11
1777401189Homologs and their sister chromatid make upone duplicated chromosome12
1777401190Cell death occurs through eitherNecrosis or Apolosis13
1777401191NecrosisCell death through O2 depletion or damage to the cell14
1777401192ApolosisDNA breakdown; wearing down of telomere until it can not replicate anymore resulting in cell death15
1777401193How many times a somatic cell can divide before DNA degradation occurs2016
1777401194Synapsispairing of chromosomes17
1777401195ChiasmaThe spot where the sister pairs of homologs cross over18
1777401196Crossing overCreates more variation, exchange of DNA between homologs; where genetic material from mom and dad mix and become part of the others chromosome19
1777401197TetradA homologous pair; two whole replicated chromosomes20
1777401198InterkinesisAt the end of telophase one, where the cell relaxes before it enters prophase two21
1777401199Three types of sexual cycles1. Haplontic 2. Diplontic 3. Alternation of generation22
1777401200HaplonicFor most of its life it is halpoid and a small portion it is diploid23
1777401201DiplonticFor most of its life it is diploid and a small portion it is haploid24
1777401202Alternation of GenerationOnly in plants; half of its life it is spent haploid the other half diploid25
1777401203Euploidy seriesOrganism has the amount of chromosomes it needs; has its full compliment26
1777401204Aneuploidy seriesThere is a mutation during meiosis where the chromosomes do not separate correctly and take the wrong number of chromosomes to poles27
1777401205Meiosis reduces the number of chromosomes fromdiploid to haploid28
1777401206Generates genetic variationRandom orientation of pairs of homologous chromosomes during meiosis29
1777401207HomologousOne maternal and one paternal chromosome situated at metaphase plate30
1777401208Independent assortmentAfter the first meiotic division results in each pair sorting its maternal and paternal homologs into daughter cells that are independent31
1777401209KaryotypeDepectin (picture) of the chromosomes32
1777401210Y chromosome and X chromosomecan not cross over33
1777401211Two members of homologous pairsassociated loosely along their length (prophase 1)34
1777401212At least one cross over per chromosome must occur in order forthe homologous pair to stay together as it moves to metaphase 1 plate35
1777401213differ geneticallyMeiosis produces cells that36
1777401214Three events unique to meiosis that occur in meiosis 11. Synapsis and crossing over 2. Homologous pairs of metaphase plate 3. Separation of homologs37
1777401215cohesionSister chromatids stay together due to38
1777401216Cohesions last untilthe end of metapase39
1777401217Meiosis 1 is called the reductional division becauseit reduces from diploid to haploid40
1777401218During meiosis 2sister chromatids separate resulting in the four haploid daughter cells (equational division)41
1777401219Results in the formation of chiasmaCombo of crossing over and sister chromatid cohesion along arms42
1777401220homologsChiasmata hold together43
17774012211st divison, 2nd divisionreductional, equational44

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