医学遗传学——09人类染色体

医学遗传学——08群体遗传

医学遗传学——06多基因遗传

医学遗传学——05单基因遗传

医学遗传学——04突变基因的分子细胞生物学效应

医学遗传学——02人类基因

Bacterial chemical components Water: free water and compound water. Inorganic salt: phosphus, potassium magnesium,calcium, nitrium,etc. Protein: 50%-80% of dry weight accordingbacterial kinds and age. Sugar: mainly distributing in cell wall andcapsule. Lipids: composed of lipid, fatty acid, wax, etc. Nucleic acid: RNA and DNA

Symbioses Commensalism: one partner benefits and the other is neither harmed nor benefited. Mutualism: both partners benefit. Parasitism: one partner benefits at the expense of the other

Gram-negative rods Curves or comma shaped Non-spore forming Highly motile-single polar flagella Associated with salt water Oxidase positive Facultative anaerobe Tolerate alkaline conditions to

Actinomyces A.israelii,A.naeslundii; Gram positive;sulfur granule; Related to decaytooth and peridentitis