1. Duplication
2. Inversion
3. Deletion
4. Translocation
Cri-du-chat Syndrome: Cause Explained
Cri-du-chat syndrome is a rare genetic disorder that affects development. The name 'Cri-du-chat' is French for 'cat's cry' because infants with this syndrome often emit a high-pitched cry that sounds like a meowing cat, which is one of its characteristic features.
This specific chromosomal aberration occurs when a piece of a chromosome is lost. In the case of Cri-du-chat syndrome, the issue arises from a deletion on the short arm (denoted as 'p') of chromosome 5. This means a small segment of the genetic material on chromosome 5 is missing.
Let's look at why the other options are not the cause:
- Duplication: This involves having an extra copy of a chromosome segment, rather than a missing piece.
- Inversion: This is when a segment of a chromosome breaks off, flips around, and reattaches to the same chromosome.
- Translocation: This occurs when a piece of one chromosome breaks off and attaches to another chromosome.
Therefore, the primary cause of Cri-du-chat syndrome is a deletion of genetic material from chromosome 5p.
Important Questions from Biology
Which of the following statements about living and non-living being is/are correct?
1. While living being can demonstrate growth and repair, non-living being cannot.
2. While living being demonstrates metabolic processes, non-living being does not.
Select the correct answer using the code given below.Movement of materials to different parts of cytoplasm and nucleus is generally carried out by
The gaseous product of a process in plants is a requirement for another vital process that releases energy. Given below are four combinations of the process and product. Identify the correct answer.
Which one of the following cell organelles may play a role in expelling excess water and wastes in case of unicellular organisms?
Transformation of meristematic cells into specific permanent tissues occurs by the process of
