26th August 2020

The chance a male child, whose mother is a carrier of the haemophilia B gene, and whose father is unaffected, suffering from haemophilia B is:

The chance a male child, whose mother is a carrier of the haemophilia B gene, and whose father is unaffected, suffering from haemophilia B is:

Select the SINGLE most appropriate option from the list below. Select ONE option only.