In a fruit fly experiment, two gray-bodied fruit flies produce mostly gray-bodied offspring, but some offspring have black bodies.

In a fruit fly experiment, two gray-bodied fruit flies produce mostly gray-bodied offspring, but some offspring have black bodies. If there are 280 offspring, how many do you predict will have gray bodies and how many will have black bodies? How many of the 280 offspring do you predict will be heterozygous? Show your work