Question

sickle-cell. What percent of offspring should have any sickle-cells? Enter only a whole number.

Answer 1

the start of your question seems incomplete.I have answered all the possibilities. Whichever fits your question, you can use that.

If one parent is the carrier (HbAS) and the other is not (HbAA) then no children will have sickle cell anaemia. There is a 50%) chance that any given child will get one copy of the HbS gene and therefore be a carrier. There is a 50% chance that any given child will get two HbA genes and be completely normal.

If both parents are carriers (HbAS) there is a 25% chance that any given child will have sickle cell anaemia. There is also  a 25% chance that any given child could be completely normal. There is a 50% chance that any given child will be a carrier

If one parent is a carrier (HbAS) and the other is affected by the condition (HbSS) there is a 50% chance that any given child will be a carrier and a 50% chance that any given child will get sickle cell anaemia.

If one parent has sickle cell anaemia (HbSS) and the other is completely normal (HbAA) then all children will be carriers.

if Both parents are affected(HbSS), then all the children will also be affected(100%)