DNA is the main type of genetic material found in a cell. In addition,
it is found in the nucleus of the cell, so (D) is correct. DNA in the
nucleus is used in replication (through mitosis and meiosis) via
daughter cells to continue cell growth.
Genetic information, essential to the construction and functioning of the cell and plant, is found mainly in the nucleus. It is the same in all the cells of the plant, which copy it at each cell division. The expression of this information is specific to the function and role of the cell, but the unused information remains.
Deoxyribonucleic acid (DNA) is the universal carrier of genetic information in living beings.
Karyotyping can be used to detect a variety of genetic disorders. For example, a woman who has premature ovarian failure may have a chromosomal defect that karyotyping can pinpoint. The test is also useful for identifying the Philadelphia chromosome. Hope this helps :)