Awild-type chromosome can be represented as abc[*]defgh, and from this a chromosomal aberration arises that can be represented abc[*]degfh, where [*] represents the centromere. this aberration is known as a: a. deletionb. duplicationc. paracentric inversiond. pericentric inversione. translocation

C. paracentric inversion

Explanation:

In the given chromosome with sequence ABC[*]DEFGH, the segment with "FG" was broken and then joined in the opposite direction resulting in the chromosome which is now represented as  ABC[*]DEGFH. Inversion is a chromosomal abnormality in which the breakage and rejoining of chromosomal segments result in the presence of a genetic segment oriented in the opposite or reverse direction. The inversions in which the centromere is outside the inversion loop are called paracentric inversions. Since inversion in the given segment did not involve centromere, it represents paracentric inversion.

i'd say that the moon rock is about 2.2 billion years old.