Cystic fibrosis is a recessive genetic disease caused by a mutation in the gene that encodes the CFTR protein, which transports
chloride ions in and out of cells. Some populations have a relatively high rate of cystic fibrosis carriers, possibly because the mutation protects against severe dehydration in diseases like cholera or typhoid. What concept does this best illustrate? A: Polygenic traits
B: Genetic drift
C: Pleiotrophy
D: Heterozygote advantage
The frequency of the dominant (normal) allele in the population (p) is simply 1 - 0.02 = 0.98 (or 98%). The percentage of heterozygous individuals (carriers) in the population.
Hypomagnesemia is a condition of low magnesium levels in the body and because magnesium acts as an active cardiovascular electrolyte, its deficiency leads to cardiac complications such as dysrhythmias.
People who suffer from myocardial infarction are often treated for hypomagnesemia to improve their cardiac conduction, however, hypomagnesemia can also develop in chronic alcoholics.
The other reasons that could lead to the condition faced by Robert Stevens can be hypokalaemia however, as he is also chronic alcoholic hypomagnesemia is the main cause.
