What are the functions of the lower jaw and conus arteriosus for a frog?

The primary function of the conus arteriosus is to prevent the backflow of blood and keep a steady flow of blood into the ventral aorta and the gills. The lower jaw in a frog helps in opening and closing of mouth which is necessary to catch and to holding a prey.

The primary function of the conus arteriosus is to prevent the backflow of blood and keep a steady flow of blood into the ventral aorta and the gills.

The answer would be d because x,y = male and x,x = female so x,y is male so xxy is male with a female trait!