Mitosis goes in the order of PMAT, or Prophase, Metaphase, Anaphase, and Telophase.
Prophase is when the nuclear envelope breaks down and the chromosomes are visible. Metaphase is when the chromosomes line up in the middle. Anaphase is when the spindle fibers pull the centromeres apart. Telophase is when the chromosomes go to the opposite sides and the nuclear envelope reappears.
Crossing-over is the exchange of genetic material between homologous chromosomes. It results in new combinations of genes on each chromosome. When cells divide during meiosis, homologous chromosomes are randomly distributed to daughter cells, and different chromosomes segregate independently of each other.
Antibiotic resistance happens when an antibiotic lost its ability in controlling or killing bacterial growth. At this moment the bacteria are already resistant to the antibiotic and are multiplying even though the drug is present. This is a natural phenomenon.
