Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Myotonic dystrophy is an autosomal dominant trait that is characterized by progressive muscle wasting and weakness. People with this disorder show prolonged muscle contractions. A person may experience difficulty in releasing their grip and may have temporary locking of their jaw.
In the given pedigree chart, this trait is known to affect both males and females without skipping any generations. In order for this to be possible, either of the parents of the offsprings should possess the trait.