Genealogical analysis of a child with myotonic dystrophy determined that this disease is present in every generation, equally presented by the relatives of both genders, the risk of inheriting this disease is equal no matter which parent is affected. If one of the parents is heterozygous for this disease and the other parent is healthy, the risk of them giving birth to a sick child is 50%. What type of disease inheritance is it?

Question

Answer options

X-linked dominant
Y-linked
Autosomal dominant
Autosomal recessive
X-linked recessive

Correct answer

Autosomal dominant

Explanation

Autosomal: not gender-dependent i.e., equally presented by the relatives of both genders; dominant: the disease is expressed in every generation, if one parent is heterozygous and another parent is healthy, the risk of a sick child is 50%.

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