X-linked dominant genes, Biology

X-Linked Dominant Genes

Dominant X-linked genes are always expressed in both the sexes just as in autosomal traits. One dose of X-linked dominant allele produces its effects in males as well as females. The hemizygous male transmits the gene to all its daughters but none to his sons. There is no father to son transmission. The heterozygous females transmit the trait to half their children, irrespective of lhcir sex. On the other hand, females homozygous for the dominanl allele produce all affectcd children. For example, a form of vitamin D-resistant rickets is inhcrited as an X-linked dominant
trait (Figure shown below).

1353_x-linjed.jpg

Posted Date: 12/11/2012 4:41:52 AM | Location : United States







Related Discussions:- X-linked dominant genes, Assignment Help, Ask Question on X-linked dominant genes, Get Answer, Expert's Help, X-linked dominant genes Discussions

Write discussion on X-linked dominant genes
Your posts are moderated
Related Questions
Q. Need for insulin in management of Type 1 Diabetes Mellitus? Type 1 Diabetes Mellitus occurs when the body's immune system destroys beta cells. Beta cells produce insulin, a

Consumers - Biotic Components These are also called as phagotrophs or heterotrophs. The organisms grouped under this category cannot manufacture their own food but obtain the

Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar

How Viruses Multiply? Obligatory parasitism - Outside cells viruses are nonliving, inactive   particles but after entering into live cells these multiply fast by replication

A woman was injured several years ago in a car accident and she was diagnosed with a herniated disc. Can you please explain using the correct anatomical terminology what herniation

Phenylketonuria is a severe form of mental retardation caused by a recessive allele. The condition affects about 1 in 25,000 newborn babies. In a population of 250,000 people, how

The Intine Layer As soon as the tetrads release the microspores, the inner layer of the pollen wall (intine) is formed. Proteinaceous lamellae are embedded in the matrix of th

Define the properties of solutions Several properties of solutions are particularly important in food preparations. Amongst these are colligative properties, such as vapour pre

Name the different level of proteins There are 4 level of proteins:- a) Primary structure b) Secondary structure c) Tertiary structure d) Quaternary structure

SMAL L INTESTINE - A narrow tube 6 m long. In rabbit 4 m. long.Differentiated into duodenum, jejunum & Ileum. (i) Duodenum - 2.5 cm long. C-shaped (U-shaped in rabbit)