Final answer:
A predisposition to a genetic disease means there is a higher risk of developing that disease, not a guarantee. It's based on genetic factors that increase this likelihood, and pedigree analysis can help in understanding the associated risks.
Step-by-step explanation:
Having a predisposition to a given genetic disease implies that b) You have a higher risk of developing the disease. A predisposition does not guarantee that the individual will develop the disease nor does it mean they have immunity or will never develop it. Instead, it indicates that the individual has genetic factors that increase the likelihood of developing the disease compared to the general population. For instance, in the case of a recessive genetic disorder, an individual who carries one copy of a recessive disease-causing allele will not show symptoms of the disease but has a risk of passing the allele to their offspring. If two carriers have children, there is a 25% chance that their child will inherit two copies of the allele and thus the disorder. Pedigree analysis is often used by geneticists to determine the likelihood of an individual being a carrier and the risk of their offspring inheriting such diseases.
Many human diseases are genetically inherited, and knowing one's genetic predisposition can help in understanding the risk of transmitting the disease to future generations. This knowledge can also be important for individuals to make informed health and reproductive decisions.