Dictionary > Hemizygosity

Hemizygosity

Definition
noun
A genetic condition where there is only one copy of a gene in an otherwise diploid cell or organism.
Supplement
For example, a copy of a gene that is deleted will result in hemizygosity in a diploid cell or organism. Hemizygosity is also displayed in human males where there is only one X chromosome (as the other sex chromosome is a Y chromosome). In another example, male honeybees are hemizygous as they develop from unfertilized eggs (unlike female honeybees that develop from fertilized eggs and thus have two sets of genes).
Word origin: Greek hēmi- half + zygosity.

Related forms: hemizygous (adjective)
Compare: homozygosity, heterozygosity

See also: zygosity


You will also like...

Adaptation Tutorial
Adaptation Tutorial

Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..

Stem
Stems

Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

Biological Cell Defense
Biological Cell Defense

Organisms employ different strategies to boost its defenses against antigens. Humans have an immune system to combat pat..

Still Water Community Plants
Still Water Community Plants

This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

New Zealand Fauna
New Zealand’s Unique Fauna

Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..

Related Articles...

No related articles found

See all Related Topics