Alleles for a particular phenotype determine what characteristic an organism will express, as with the following example where. 1  Chromosome 1 contains an allele for blonde hair. 2  Chromosome 2 contains an allele for brown hair. 3  Chromosome 3 contains an allele for blue eyes. 4  Chromosome 4 contains an allele for brown eyes.
Because of the patient's smoking history and abnormal chest radiograph, a neoplasm was initially suspected as a cause of SIADH. The head trauma was too remote to be of concern. Although 1 case of risperidone-associated hyponatremia has been reported, the risk seems low with this agent and with olanzapine.
1 Hyponatremia may be a side effect of medications, especially diuretics or water pills used to help control blood pressure. 2  This class of drugs can cause excessive loss of sodium in the urine. 3  Hormonal diseases such as Addison's disease or adrenal insufficiency and hypothyroidism may be associated with low sodium levels.pecific situations. 1  Hyponatremia may be a side effect of medications, especially diuretics or water pills used to help control blood pressure. 2  Hormonal diseases such as Addison's disease or adrenal insufficiency and hypothyroidism may be associated with low sodium levels. 3  Polydipsia, or excessive water intake, may cause water intoxication, ... 4  I