inheritance of sex

• a pair of chromosomes called sex chromosomes controls where you are male or female
• the XY combination is the male, XX is the female
• in humans there are two types of gametes (egg cells) which have either an x or y chromosome
• the ratio is 1 male: 1 female
• meiosis cells have unpaired chromosomes and can have exchange of genetic material
• meiosis are genetically different cells
• meiosis forms 4 nuclei
• mitosis is defined as nuclear division which is genetically identical
• at the end of a mitotic cell division, the number of cells is doubled and the daughter cells are genetically identical to the parent
• mitosis takes place in eukaryotes, binary fission takes place in prokaryotes