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...

bryophyte - sporophyte and gametophyte
Meiosis and Alternation of Generations

Plants are characterized by having alternation of generations in their life cycles. This tutorial is a review of plant m..

Population Growth and Survivorship
Population Growth and Survivorship

This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

Chromosomes X and Y and Sex Determination
Chromosomes X and Y and Sex Determination

This tutorial looks at sex determination via the sex chromosomes, X and Y. Read it to get more info on X and Y chromosom..

Neural Control Mechanisms
Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

Direct and indirect physiologic effects of growth hormone
Animal Growth Hormones

Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

Consciousness and behavior
Consciousness and Behavior

Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

Related Articles...

No related articles found

See all Related Topics