Im giving 25 points and 5 star rating and to whoever an answer is less than 20 minutes
sickle cell anemia is known to run in a family. a pedigree chart for this family is shown below. the parents are shown at the top and from left to right appear as a half-shaded circle next to a half-shaded square. the two are connected by a straight line. below the parent pair is a vertical straight line connecting to the next row of circles and squares which are the offspring. starting from left an unshaded square, half-shaded circle, another half-shaded circle, and a completely shaded square are shown. all of these are also connected by a horizontal straight line.

what percentage of the offspring are carriers of the disease but do not have it? (4 points)
0%
25%
50%
100%