Answer:
C- the child must have inherited the gene from both parents.
Explanation:
Both parents could carry the trait and have no symptoms, but both parents passed it down to their child causing the child to have sickle cell anemia.
Based on the letters in the diagram
A= cell
B= nucleus
C= chromosomes
D= gene
E= DNA
F= protein
When the water is cooled, water molecules move slower and get closer together.