1. An organism is for a gene if it has two copies of the same allele for the gene. 2. The genotype of an organism and the interaction of the genotype with the environment determine the organism’s , or observable characteristics.

3. The law of independent assortment states that the separation of alleles for one gene are independent of that of other genes, unless the genes are .

4. Mendel’s law of governs which allele is expressed in an individual.

5. People with one copy of the allele that causes sickle cell anemia are called , while people with two copies of the allele have the disease.

6. In the previous section, you learned that the allele for brown eyes (B) is dominant, and blue (b) and green eyes (g) are recessive, while green eyes are dominant over blue eyes. What eye color would someone with the following genotypes exhibit? (a) BB, (b) Bb, (c) gb, (d) Bg, (e) bb.

7. Discuss the law of segregation and explain why each organism has two copies of the gene for each trait expressed.

8. What type of experiments did Mendel conduct, and what did he want to find out about the heritability of the seven traits he chose to study?