KINS 1224 Chapter Notes - Chapter 27: Lysosome, Basal Body, Bulbourethral Gland
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This step insures genetic variety in the offspring. These steps are part of meiosis which produces 4 daughter cells that subsequently differentiate into sperm. Mitosis is the basis of division of the single-celled fertilized egg, growth of an embryo and all postnatal growth and tissue repair. It is essentially the splitting of a cell with a distribution of chromosomes that result in 2 genetically identical daughter cells. There are 3 important differences between mitosis and meiosis: in mitosis each double stranded chromosome divides into two single-stranded ones but each daughter cells has 46 chromosomes (23 pairs) In meiosis the parent cell is the diploid meaning it has 46 chromosomes in 23 homologous pairs whereas the daughter cells are haploid with 23 unpaired chromosomes: in mitosis the chromosomes don"t change their genetic makeup. In an early stage of meiosis the chromosomes of each homologous pair join and exchange portions of their dna.