You are studying a disorder that is based on the genetic com

You are studying a disorder that is based on the genetic composition at three loci. Assume that a dominant allele at any locus adds 7 units of risk for the disorder and that a recessive allele at any locus adds 2 units of risk for the disorder. Individuals with 26 or more units of risk develop the disorder. The environment does not affect the presence or absence of this disorder.

How many risk units will be present in an individual of genotype AABbcc?

Solution

given, dominant allele adds 7 units of risk, whereas recessive allele adds 2 units of risk.

the given genotype, AABbcc has 3 dominant alleles and 3 recessive alleles.

3 dominant alleles contribute to 21 units of risk.

3 recessive alleles contribute to 6 units of risk.

total units of risk= 27

since individuals with 26 or more units of risk develop disorder, the genotype AABbcc having 27 units of risk develops the disorder.