Question

biology nord ic qtr b continuous learning center - credit bearing (tutor) chromosomal changes which best describes chromosomal deletion? occurs when part of a chromosome breaks off and does not reattach 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 attaches to another chromosome occurs when part of a chromosome breaks off and reattaches backward on the same chromosome

Explanation:

Chromosomal deletion is a type of mutation where a part of a chromosome breaks off and does not reattach. This results in the loss of genetic material. The other options describe different types of chromosomal mutations: insertion (part inserts into another chromosome), translocation (part attaches to another chromosome), and inversion (part reattaches backward).

Answer:

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