Meiosis.pdf - Lesson Overview Meiosis Lesson Overview Meiosis Chromosomes Chromosomes\u2014those strands of DNA and protein inside the cell nucleus\u2014are

Meiosis.pdf - Lesson Overview Meiosis Lesson Overview...

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Lesson Overview 5eiosis
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Lesson Overview DğğğÔŞŞēžžijƑņŞŞēƑņ 2Chromosomes )*+hromosomes—those strands of *+,6'() and protein inside the cell nucleus—are the carriers of genes° <he genes are located in specific positions on chromosomes°
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Lesson Overview DğğğÔŞŞēžžijƑņŞŞēƑņ 3Diploid 2Cells '() body cell in an adult fruit fly has eight chromosomes± as shown in the figure° -.our of the chromosomes come from its male parent± and four come from its female parent° <hese two sets of chromosomes are homologous ± meaning that each of the four chromosomes from the male parent has a corresponding chromosome from the female parent°
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Lesson Overview DğğğÔŞŞēžžijƑņŞŞēƑņ 3Diploid 2Cells '() cell that contains both sets of homologous chromosomes is diploid ± meaning “two sets°” <he diploid number of chromosomes is sometimes represented by the symbol ²6° -.or the fruit fly ± the diploid number is # ± which can be written as ²6 (#$% # ± where 6 represents twice the number of chromosomes in a sperm or egg cell°
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Lesson Overview DğğğÔŞŞēžžijƑņŞŞēƑņ 7Haploid 2Cells ;ome cells contain only a single set of chromosomes± and therefore a single set of genes° ;uch cells are haploid ± meaning “one set°” <he gametes of sexually reproducing organisms are haploid° -.or fruit fly gametes± the haploid number is ³± which can be written as 6 (#$% ³°
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Lesson Overview DğğğÔŞŞēžžijƑņŞŞēƑņ Phases of Meiosis Meiosis is a process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes° 5eiosis involves two distinct divisions± called meiosis 01 and meiosis 0101° ()*y the end of meiosis 0101± the diploid cell becomes four haploid cells°
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