The correct option is 3: Huntington's chorea is correctly identified as an Autosomal Dominant Mendelian disorder. This devastating neurodegenerative disease is caused by a mutation, specifically a trinucleotide repeat expansion, in the HTT gene located on an autosome (chromosome 4). The dominant nature of the disorder means that an individual needs to inherit only one copy of the defective allele from either parent to express the full disease phenotype. Key…Read More