True about autosomal dominant type of inheritance:
Answer- D. 50% affected, if one parent affectedAutosomal dominant disorders are manifested in the heterozygous state .Both males and females are affected.Because the alleles segregate randomly at meiosis, the probability that an offspring will be affected is 50%.
25% affected & 50 % carrier, if one parent affected
50% affected & 75 % carrier, if both parent affected
75% affected, if both parent affected
50% affected, if one parent affected