Here's why:
* Autosomal: The gene responsible is located on one of the autosomes (non-sex chromosomes).
* Dominant: Only one copy of the mutated gene is needed for the condition to be expressed. This means that if an individual inherits the dominant allele from one parent, they will have the disorder.
Examples of autosomal dominant disorders include:
* Huntington's disease: A neurodegenerative disorder affecting movement, cognition, and behavior.
* Marfan syndrome: A disorder affecting connective tissue, leading to tall stature, long limbs, and heart problems.
* Achondroplasia: The most common form of dwarfism.
* Neurofibromatosis type 1: A disorder causing tumors to grow on nerves, bones, and skin.
Important Note: While a dominant allele causes the disorder, the severity of the condition can vary between individuals. This is due to factors like the specific mutation, the presence of other genes, and environmental influences.
