Mode Of GenetiC inheritance
Spinal Muscular Atrophy is an autosomal recessive genetic disorder. But Finkel type SMA is not autosomal recessive it has an autosomal dominant pattern. Autosomal recessive pattern is when each parent have a copy of SMA.If there is only one parent that is a carrier that means that none of the children will have SMA but they might have a 50% chance that they will be a carrier. There is an 25% that the child will not have the disorder. There will be a 25% that the child will be healthy, they will not have SMA. There is a 50% that the child will be a carrier like the parents, it will not have SMA but it carries the gene form it. There will also be a 25% that the child will have SMA.