Dictionary > Sex linkage

Sex linkage

Definition
noun, plural: sex linkages
A condition in which a trait or a phenotype manifesting apparently more frequently in one sex over the other is associated with the gene(s) located in the sex chromosome
Supplement
The manifestation of certain traits as an outcome of the expression of particular genes in the sex chromosome is referred to as sex linkage. There are certain characteristics or traits that are apparently expressed more frequently in one sex than the other. For example, hypertrichosis of ears is observed in males due to patrilineal inheritance. This only shows that the genes in the sex chromosomes have control in the expression of certain characteristics of an individual. The sex chromosomes include genes that are not only for sex determination. And because of this, there are male or female traits that seem to be coupled with other traits.
In humans, there are two forms of sex linkage: (1) X linkage and (2) Y linkage. The difference lies on the type of sex chromosome involved. In particular, X linkage is a sex linkage involving the X chromosome whereas Y linkage is a sex linkage involving the Y chromosome. Since the X chromosome bears more genes than the Y chromosome there are more traits that are X-linked than Y-linked.
See also:


You will also like...

Body temperature regulation by the hypothalamus
Temperature Regulation in Animals

This tutorial elucidates body temperature regulation. Know the details here to learn how the body sets the body temperat..

human respiratory system
Respiration

The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

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..

Stem
Stems

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

Schematic diagram of bacterial lactose operon
Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

..

Buttress roots
Roots

This study guide tackles plant roots in greater detail. It delves into the development of plant roots, the root structur..

Related Articles...

No related articles found

See all Related Topics