Using a Punnett square, work out the probable ratios for

Chapter 22  Infectious agents o Pathogenic – cause damage or possible death to the host organism they invade o 5 categories  Bacteria  Viruses  Fungi  Protozoans  Multicellular parasites  Bacteria o Single-celled organisms o 1-2 um o Enclosed by a plasma membrane and cell wall o Prokaryotic cells o Cocci – spherical o Bacilli – rodlike o Coiled – spirilla o Some cause disease, most do not  Some have increase virulence – ability to cause serious illness because of an external, sticky polysaccharide capsule  So