First we must appreciate that genes do not act in isolation. The genome in which a genotype is found can affect the expression of that genotype, and the environment can affect the phenotype.Not all pairs of alleles will have the same phenotype: dominance when AA = Aa in phenotype, A is dominant, a is recessive.irst we must appreciate that genes do not act in isolation. The genome in which a genotype is found can affect the expression of that genotype, and the environment can affect the phenotype.
Mannitol may also be used for purposes not listed in this medication guide. You should not receive mannitol if you have severe kidney disease, lung swelling or congestion, severe dehydration, bleeding in your brain not caused by surgery, or if your kidneys have already shut down and you are unable to urinate.o make sure mannitol is safe for you, tell your doctor if you have: 1  a history of kidney disease; 2  heart disease; or. 3  an electrolyte imbalance (such as low levels of potassium or magnesium in your blood).
Mannitol (also referred to as mannite or manna sugar) is a white, crystalline solid that looks and tastes sweet like sucrose.It was originally isolated from the secretions of the flowering ash and called manna after its resemblance to the Biblical food.In plants it is used to alleviate osmotic stress.annitol has several industrial uses, but is mainly used to produce tablets of medicine. Its fetal safety is C (FDA pregnancy category: risk not ruled out) in Briggs' Reference Guide to Fetal and Neonatal Risk.