Fareeha Olaiya Meiosis POGIL

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MeiosisHow does sexual reproduction lead to genetic variation?Why?t’clkthrough uutom io uukr r u utopic) i4 the origuul tdlI his is June for g n n s i l i j n drcpjir. Scxti.illv-rcpiiHiLKing organism* hjvc j second form of cdl domain thit pn dines reproductive cdkwith hdf thr number of dtnimounneII Im prut*.-' , it t i l l ' d meiochind u i i h m n ithumxn*u.j|« ircw,hccilcs, ind ill mher Kitiailv- reproducing orpjrmms would he ratty diHerenr thin they ire rochv,Model 1 - Meiosis I1.According to Model 1, in what type of organs are the cells that enter meiosis I found?The cells are found in the sex organs2.Considering what you already know about mitosis in cells, what event must take placeduring interphase before a cell proceeds to division?- DNA replication

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3.What two structures make up a single replicated chromosome?Sister chromatids4.In Model 1, how many replicated chromosomes does the cell contain during prophase?-4Read This!A l k l n ire alicrninvt form* ot ihv vjnu gene, R>r example. gene A may ccxuain rhe information tortur color. Ontjllck “A" may mult in while fur. while the liter native allele Vmay remit in black fur.Homologous chromosomes are chromouimcs that tunr.iin ihe same genes. although cadi efiromoMinuin the homologous pan may have different allelcv5.At which stage in meiosis I do the pairs of homologous chromosomes come together?Late prophase IL6.Once the chromosomes have formed a pain what are they called?Tetrads7.At the end of meiosis L two cells have been produced. How many replicatedchromosomes are in each of these cells?- 28.Cells with a full set of chromosomes are referred to as diploid or 2n. whereas cells withhalf the chromosomes are haploid or n. At which stage(s) of meiosis I are the cellsdiploid and at which stage(s) are they haploid?Diploid- prophase, metaphase and anaphaseHaploid- telophase9.Which of the statements below correctly describes the relationship between the cells atthe end of telophase I and the original cell?a.The new cells have one copy of all of the genetic information in the original cell.b.The new cells have two copies of all of the genetic information in the originalcell.c.The new cells have one copy of half of the genetic information in the original cell.d.The new cells have two copies of half of the genetic information in the originalcell.10. Considering the genetic makeup of the homologous pairs, will the cells at the end oftelophase I be genetically identical to each other?- They will not be identical to eachother because the homologous pairs are separated and the alleles on each homologouspair are not necessarily identical.

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Model 2 - Meiosis 111 1 According to Model 2, where did each of the cells come from that started meiosis II?They came from Meiosis I12. In meiosis L during anaphase I, which structures separated—homologous chromosomesor sister chromatids (refer to model 1 for definitions)?Homologous chromosomes separated13. In meiosis II, during anaphase IL which structures separated—homologouschromosomes or sister chromatids (refer to model 1 for definitions)?Sister chromatids separated14. At the end of the meiosis II are four daughter cells. Are they haploid or diploid? Explainyour answer in a complete sentence.-The cells are still haploid because they each contain one chromosome from eachhomologous pair.

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