A Chromosome's Gene Sequence That was ABCDEFG Before Damage and ABFEDCG

Question

A chromosome's gene sequence that was ABCDEFG before damage and ABFEDCG after is an example of
A) inversion.
B) deletion.
C) duplication.
D) translocation.
E) aneuploidy.

Accepted Answer

Inversion is a type of chromosomal mutation where a segment of the chromosome is flipped in orientation. In this case, the gene sequence ABCDEFG was inverted to ABFEDCG. This is different from a deletion or duplication where a segment of the chromosome is lost or replicated, respectively. Translocation involves the exchange of genetic material between non-homologous chromosomes, while aneuploidy is the presence of an abnormal number of chromosomes.