x linked traits in humans, Biology

 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.

Posted Date: 12/11/2012 4:39:45 AM | Location : United States

Related Discussions:- x linked traits in humans, Assignment Help, Ask Question on x linked traits in humans, Get Answer, Expert's Help, x linked traits in humans Discussions

Write discussion on x linked traits in humans
Your posts are moderated
Related Questions
State the concept of Finger Tapping The subject is asked to tap his or her extended index finger on a typewriter key attached to a mechanical counter. Several series of 10-seco

Explain Precautions for Preparation of Bacterial Smear? 1. Plates used should be prepared 24 hours before use to avoid spreading of colonies due to moisture in plates. 2. Sw

Define Management of Canal Blockage Canal Calcification Diamond coated instrument rt 1 designed for better visibility and cutting efficiency a) Very powerful for efficient

Echocardiography: LV hypertrophy can be identified using M-Mode and 2 D imaging. Indications of myocardial ischemic states and systolic functions can be assessed by studying region

Oogenesis in Mammals In mammals also the oogonial cells are derived from primordial germ cells. The multiplication phase, that is all of the oogonial divisions and transforma

Describe the process of biosynthetic phase of photosynthesis occurring in the chloroplast. Explain the process of development of root nodules in a leguminous plant. Name the ox

We now understand that mutations that cause the inhibition of apoptosis are found in tumours. Because proliferation itself is not induced by the inhibition of apoptosis, explain ho

What is xaxim? Most pteridophytes have subterraneous stems parallel to the substrate known as rhizomes. Xaxim is a type of pteridophyte with an aerial stem generally perpendicu

In studies of human body, which of the below terms is used to describe the first step in production of urine? Is it: a) Tubular reabsorption b) Tubular secretion c) Glome

Q. How many chromosomes does a human normal diploid cell have? How many chromosomes does a human normal haploid cell have? How many are the sex chromosomes within each of them?