Final answer:
Information about allele dominance or recessiveness cannot be directly obtained from the Human Genome Project; this requires studying inheritance patterns. Similarly, PGD can diagnose genetic conditions like sickle cell anemia or Down's syndrome, but not sexually transmitted diseases.
Step-by-step explanation:
From the Human Genome Project, we cannot determine whether an allele is dominant or recessive solely by its sequence. The project provided extensive information about the sequence of human DNA, identifying the causes of genetic disorders, the amino acid sequences of human proteins, and the locations of genes on chromosomes. However, understanding whether an allele is dominant or recessive requires studying its expression in a population and observing inheritance patterns, which is beyond the direct scope of the Human Genome Project. This applies similarly to Prenatal genetic diagnosis (PGD), which can diagnose genetic characteristics and conditions such as the inheritance of sickle cell anemia, Down's syndrome, and determination of sex, but it cannot diagnose the inheritance of sexually transmitted diseases as these are caused by infectious agents and not inherited genetically.