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.
Risperdal and Weight Gain. There is clear evidence in support of the idea that this drug has potential to cause weight gain. It is believed that carriers of the leptin gene -2548G/A and variants may have different responses to Risperdal, and thus may not gain as much weight.n a positive note, research does indicate that when you discontinue Risperdal, you should lose the weight that you gained. In other words, the weight gain associated with this medication is reversible, but does take time.