The type of chromosomal alteration in which a segment of a chromosome breaks off and does not reattach to any chromosome is called (3) deletion.
- Explanation:
- Deletion occurs when a portion of a chromosome is lost during cell division, leading to the absence of certain genes in the affected individual.
- This type of mutation can have significant consequences as it results in the loss of genetic material, which can impact the functioning of the genes within that region.
- An example of a disorder caused by deletion is Cri du Chat syndrome, where a portion of chromosome 5 is deleted, leading to developmental delays and distinctive facial features.
In summary, when a segment of a chromosome breaks off and is not reattached to any chromosome, this is known as a deletion, which can have profound effects on an individual's genetic makeup and health.
