Answered

Which best describes chromosomal deletion?


occurs when part of a chromosome breaks off and is inserted into the middle of another chromosome

occurs when part of a chromosome breaks off and reattaches backward on the same chromosome

occurs when part of a chromosome breaks off and does not reattach

occurs when part of a chromosome breaks off and attaches to another chromosome

Verified Answer :

Kalahira

Chromosomal deletion is the loss of genetic code, caused by a segment of
chromosome breaking away during DNA replication. The best answer is the
third one, "when part of a chromosome breaks off and does not
reattach."

The first answer, "part of a chromosome breaks off
and is inserted into the middle of another", describes chromosomal
insertion.

The second answer, "part of a chromosome breaks off and reattaches backward", describes chromosomal mutation.

The final answer, "part of a chromosome breaks off and attaches to another", describes chromosomal translocation.

Answer:

Basically when the part of a chromosome breaks and doesn't reattach therefore "deletion"