Why is huntingtons disease more common than other serious dominant genetic disorders?

Answer 1

Huntingtons is a genetically inherited disease from a parent. when chromosomes are passed onto a child, the child wont always receive the chromosome containing the gene. But, if they do inherit the gene they will have the disease no matter what, because the disease is dominant. If it was recessive, the child could inherit the disease but not necessarily get the disease.

Answer 2

HD is dominant because it is a protein mutation that is inherited from a copy of a parents mutated gene. Because this gene is inherited from a parent who has the same problems, the child has a fifty percent chance of inheriting that gene and having the dominant Huntington's disease.

Answer 3

The symptomsof HD usually appear at an age where the person will already have had children. In an early onset disease, the person may have decided not to have children, or have died. The late onset increases the likelihood that the disease will grow in the population.