In this article we will discuss about the major histocompatibility in human body and its classes. B and T cells contain membrane receptors that react with specific antigenic determinants. B cells are activated by interaction with the antigen either in its dissolved form or while it is still a part of the surface of the pathogen. In contrast, the T [...]
In this article we will discuss about the syndromes of abnormalities that occurs in humans. 1. Autosomal Trisomy: a. Down's Syndrome (DS) or Trisomy-21: Down's syndrome is named after the physician J. Langdon Down who first described this genetic defect in 1866 and it was formerly called mongolism or Mongolian idiocy. It is usually associated with a trisomic condition for [...]
The following points highlight the top three techniques used to study the genetics of human traits. The techniques are: 1. Pedigree Analysis 2. Amniocentesis 3. Twins. Technique # 1. Pedigree Analysis: Since, in human beings controlled crosses cannot be made, so human geneticists have to resort to a scrutiny of established matings in the hope that informative matings have been [...]