At present, scientists can determine the arrangement or relative positions of genes or DNA sequences on a chromosome. How does this knowledge benefit us?
- It is possible to know the pedigree of livestock.
- It is possible to understand the causes of all human diseases.
- It is possible to develop disease-resistant animal breeds.
Which of the statements given above is/are correct?
- 1 and 2 only
- 2 only
- 1 and 3 only
- 1, 2 and 3
Explanation
Option (c) is correct
- Scientists can now determine the arrangement of genes on a chromosome, offering significant benefits.
- This knowledge helps in tracing the pedigree of livestock, aiding in selective breeding for desirable traits. It also enables the development of disease-resistant animal breeds by identifying genetic markers linked to immunity. However, while genetic mapping helps understand many genetic disorders, not all human diseases have a purely genetic cause, as environmental and lifestyle factors also play a role.
