x linked traits in humans, Biology

Assignment Help:

 X-Linked Traits in Humans

Let us first examine traits determined by genes on the X-chromosome, or the X-linked traits. The human X chromosome contains many genes that are required in both the sexes, whereas the Y chromosome contaias only a few genes, principally the genes for maleness. More than two hundred traits have been found to be X-linked and only a few are known to be Y-linked. The traits controlled by genes located on the X-chromosome are also referred to as sex-linked. That is, the terms X-linked and sex-linked are used synonymously. It is more appropriate, however, to refer to these as X-linked traits, since they follow the pattern of transmission of the X-chromosome. The X-linked traits have a unique mode of inheritance because females have two doses of X-linked genes, while males have only one. Males are thus hemizygous for X-linked traits.


Related Discussions:- x linked traits in humans

Kingdom, general characteristics of sponges

general characteristics of sponges

Origin of plastid, ORIGIN (1) From Pro plastid (2) Division (3) E...

ORIGIN (1) From Pro plastid (2) Division (3) Endosymbiotic origin from a cyanobacterium

Advantages of autonomous transactions, Advantages of Autonomous Transaction...

Advantages of Autonomous Transactions An autonomous transaction, once started is fully independent. It shares no locks, resources, or commit-dependency with the main transacti

Define deficiency and toxicity of vitamin d, Define Deficiency and Toxicity...

Define Deficiency and Toxicity of Vitamin D? Infants constitute a population at-risk for vitamin D deficiency because of relatively large vitamin D needs brought about by their

Hiatus hernia, Hiatus Hernia: In  this type of hernia, cardiac end of ...

Hiatus Hernia: In  this type of hernia, cardiac end of  the stomach passes through an abnormally wide oesophageal opening in the diaphragm  (see Fig. 2.6). Clinical manifestat

Unit membrane model, structure explanation of unit membrane model

structure explanation of unit membrane model

Regeneration - root and shoot morphogenesis, Regeneration - Root and Shoot ...

Regeneration - Root and Shoot Morphogenesis Higher plants have three kinds of regenerative activities; All plants possess inherent ability to regenerate lost parts. Fo

Tautomeric shifts, The original DNA sequence when ,transcribed and translat...

The original DNA sequence when ,transcribed and translated would yield five successive valine residues. But the altered sequence would correspondingly read one aspartate and four s

Which kind of animals does the placenta exist, Q. In which kind of animals ...

Q. In which kind of animals does the placenta exist? What is its major function? True placenta is present in placental mammals. The placenta is formed from the chorion of th

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd