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

Endosperm, 1. What are the examples of helobial endosperm

1. What are the examples of helobial endosperm

Neurosecretory systems, Neurosecretory Systems Almost all groups of m...

Neurosecretory Systems Almost all groups of multicellular animals have been investigated to find out if neurosecretory cells are present in them. Such investigations have sho

Define historical example of ecosystems science, Define Historical example ...

Define Historical example of Ecosystems Science? Mathematical and statistical tools are central to enhancing our understanding of large-scale systems and contain, for instance,

Respiration, lesson plan practical requirements

lesson plan practical requirements

Method of purchasing a service, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Cell Division, What is the difference between Mitosis and Meosis?

What is the difference between Mitosis and Meosis?

Do we know what causes mental illnesses or how to treat them, Do we know wh...

Do we know what causes mental illnesses, or how best to treat them? Mental illnesses take various forms: debilitating sadness in depression; uncontrollable repetitive actions i

What is heterophagic intracellular digestion, Heterophagic intracellular di...

Heterophagic intracellular digestion is the breaking into minute substances of external substances engulfed in the cell by pinocytosis or phagocytosis. Phagosomes or pinosomes fuse

Transcription of a eukaryotic protein-coding gene, 1. Describe how the vari...

1. Describe how the various molecular mechanisms act to regulate transcription of the genes within the lactose operon of E. coli . 2. Transcription of a eukaryotic protein-codi

Define objective of national programmes targeting infants, Define Objective...

Define Objective of national programmes targeting infants? These programmes have the objective of hinging down under-5 mortality. Under Integrated Child Development Services (I

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