Final answer:
The sequence A B C D E F G • H I is a c) normal sequence of genes on a chromosome. Chromosomes are DNA structures carrying genes that control traits like blood type. The normal human cell contains 46 chromosomes.
Step-by-step explanation:
The sequence A B C D E F G • H I represents a normal sequence of genes on a chromosome. This sequence simply lists the order of genes and does not indicate any abnormality such as a deletion, duplication, or inversion. Therefore, the correct answer to whether this chromosome is a) Subscript normal b) Superscript normal c) Normal d) None of the above, is c) Normal.
Chromosomes are long strings of genetic material, which are made up of DNA. In each chromosome, sequences of DNA compose genes. These genes control various traits and characteristics that are visible in organisms. For instance, human chromosomes contain genes that determine blood type, with three possible gene sequences that code for the A, B, and O blood types.
It's important to note that a normal gene sequence does not only refer to the sequence of genes but also to the presence of the correct number of chromosomes, which should be 46 in a normal human cell (23 pairs).