Question

A diseased man marries a normal woman. They get three daughter and five sons. All the daughter were diseased and sons were normal.The gene of this disease is

• A. Sex linked dominant
• B. Sex linked recessive
• C. Sex limited character
• D. Autosomal dominant

Answer 1

The correct option is A Sex linked dominant

Since all the daughters are effected and sons unaffected the gene is dominant, in daughter the chromosomes are X"X one is from mother and one from father, but father is affected. In case of sons they do not inherit X chromosome but they take Y chromosome from father so they all are normal but daughters are affected.

So, the correct answer is"Sex-linked dominant".