Name: _______________________________ Date: ______________ Period: _____________ 1. Free earlobes are a dominant trait. Attached earlobes are a recessive trait. Use the symbols E and e to label each of the numbered individuals. The shaded regions show individuals who are homozygous recessive for attached ear lobes. They exhibit the trait being studied; they have attached ear lobes. I. 2 1 II. 4 3 III. 5 6 9 8 7 10 IV. Name: _______________________________ Date: ______________ Period: _____________ 1. Free earlobes are a dominant trait. Attached earlobes are a recessive trait. Use the symbols E and e to label each of the numbered individuals. The shaded regions show individuals who are homozygous recessive for attached ear lobes. They exhibit the trait being studied; they have attached ear lobes. I. II. 3 III. 6 5 IV. 2 1 10 7 4 8 9 2. Hemophilia is a disease in humans that causes the blood to clot slowly. It is a sex-linked trait that is caused by a recessive gene on the X chromosome. Label each of the numbered individuals Using H for normal blood clotting and h for hemophilia. Remember to label both the X and Y chromosome. I. II. III. 2 1 3 7 4 8 5 9 IV. 6 10 11 2. Hemophilia is a disease in humans that causes the blood to clot slowly. It is a sex-linked trait that is caused by a recessive gene on the X chromosome. Label each of the numbered individuals Using H for normal blood clotting and h for hemophilia. Remember to label both the X and Y chromosome. I. II. III. IV. 2 1 3 7 4 8 5 9 6 10 11 2