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

Both sickle cell anaemia and Huntington’s chorea are

Which of the following is not a hereditary disease?

When a segment of a chromosome breaks and later rejoins after $180^{\circ}$ rotation,it is known as

Barr bodies and drumsticks are of what significance to genetists and biologists