X chromosome
- Pronunciation
- /eks KROH-muh-sohm/
- Category
- Genetics
- Singular
- X chromosome
- Plural
- X chromosomes
Definition
One of the two sex chromosomes in many organisms, including insects. It plays a crucial role in determining the sex and carries genes essential for development and functioning.
Etymology
From 'X' representing its discovery order and 'chromosome', derived from Greek 'chroma' meaning color and 'soma' meaning body, because chromosomes are strongly stained by certain dyes.
Example
In many insect species, the presence of two X chromosomes results in a female, while one X chromosome leads to a male.
Related Terms
Usage Notes
In some species, other chromosomal systems may determine sex. The role of the X chromosome can vary across different organisms.