subject: Human Genetics And Genetic Disorders [print this page] Human genetics is the basis of the inheritance in human beings. Encompassing a wide variety of overlapping fields that include classical genetics, molecular genetics, extogenetics, and multiple other types of genetics, it is a very important aspect of biological science.
Usually the behavioral pattern in human beings is determined on the basis of genetic factors. Genes are the basic factors that influence the physique as well as psychology of a person. That is reflected in their behavioral patterns. Moreover the study of genes could be very useful in determining the answer to certain questions relating to human anatomy and psychology. At times the detection of diseases is also dependent on the genes. It has been scientifically established that many critical diseases like the diabetes often have genetic basis.
Genetic disorders can create problems for the people in their subsequent lives. Medical science usually depends a lot on finding the genetic orders so that the disorders can be determined and treated. One of the basic genetics is Trisomy 18, also known as the Edward's syndrome. It is one of the conditions that results from the extra genetic materials.
A major chromosomal disorder in human anatomy, Trisomy 18 is characterized by physical and intellectual features. Babies with trisomy 18 often display the signs and symptoms like low birth weight, very small head, heart defects, clenched hands, and also kidney problems. Intensity of disorder may vary from person to person.
Worldwide influence of trisomy 18 has been estimated at over 5000 live births. Majority of the babies that suffer from this disorder are from fair sex. Unfortunately, complications arising out of these disorders of human genetics are often fatal and cause much death in the process. Most of the babies that are born with trisomy 18 die within a few weeks of birth.
Basic feature of human anatomy is such that it has two sets of chromosome 18 in each of the somatic cells. However people suffering from Trisomy 18 have three such somatic cell copies. Extra chromosome affects both health as well as development of the body. In result the signs of the genetic disorder like trisomy 18. It is rare that tirsomy 18 is present in only some body cells but not in other. This only happens with few lucky people who are suffering from not full but partial trisomy. Such disease may not be fatal.
