1. use ten beads and a centromere of one color to construct the long
chromosome. use ten beads and a centromere of a second color to construct
the second chromosome in the long pair. make a drawing of the
chromosomes in the space below.
2. for the second pair of chromosomes, use only five beads.

Red blood cells are responsible for transporting oxygen in the blood. people with sickle cell anemia were born with a defective gene that results in sickle-shaped red blood cells. individuals with the disease often suffer pain in their extremities due to the build-up of these cells causing blockages in the blood vessels. the shape of the blood cells also reduces the amount of oxygen transported in the blood.