Apatient in cardiac arrest receives vasopressin [pitressin] during cardiopulmonary resuscitation (cpr). an increase in which finding would indicate a desired effect of the medication?

Color blindness is a recessive trait. the gene for color blindness is on the x chromosome. the family tree below shows the trait of color blindness. the only unknown is the mother in the first generation

1. which of the following is correct regarding opiates/opioids: a. they all have a natural component as a starting pointb. they have low addiction possibilitiesc. methadone binds to some of the same receptorsd. a and care correcte. all are correct

Why has two different alleles for the same trait?