testing facts are must to be known by everybody. Genetic testing is a very
useful; tool for preventing inherited disorders. Genetic counseling and genetic
testing go hand in hand as a person needs to be counseled before a genetic
testing. Read on to know the answers to questions about genetic testing and to
get all the facts about genetic testing.
The principle fact regarding genetic
testing is that it provides extensive information on the individualâ€™s
genetic makeup. It provides ample insight into the probable risks regarding genetic
disorders that is exposed to and whether he is the carrier of any genetic
disorder that can be passed on to his future generations through genetic
mutations. Accordingly, the person can plan his treatment and future decisions
regarding important events in life.
Counseling Precedes the Genetic Testing
The nature of genetic testing is very complicated and
has the potential to ender serious impact on the life and relationships of the
said individual. This is why genetic counseling is suggested so that the person
can make an informed decision on how to and whether he at all wants to go ahead
with it or not. Genetic
Counseling is of great help in clearing off doubts and preparing the
individual and his/her family if the results are negative or uncertain.
is Always Maintained in Genetic Testing
One need not fear regarding any intrusion of their
privacy or misuse of the reports. The clinic and the counselors are committed
to respect the privacy of the individual. They will also make sure that they
divulge the details to your family only after obtaining permission from you.
Although at times the doctors do advise the patient to share the results with
their immediate family.
Genetic Disorders are X-linked
When the gene residing on the X-chromosome is
mutated, the genetic disorder is termed as recessive. Men carry an X and a Y
chromosome and women have two X chromosomes. The woman is considered to be a
carrier of a genetic disorder if there is a recessive gene mutation in any of
her X chromosomes.
It should be noted here that there is a big
difference between being a carrier and contracting the disease. The woman may
not show any symptoms of the said disorder whatsoever even if she is the
carrier. But if she happens to give birth to a son, there is a 50% chance of
the child inheriting the disorder. And if she gives birth to a daughter, there
is a 50% chance of the child being a carrier of the disorder.
all Prenatal Tests are Diagnostic
Often the would-be
mothers are asked to go for a maternal serum screening test. This test can
identify some specific disorders like open neural tube defects and down
syndrome. If the test
yields a positive result, amniocentesis is called for. While the maternal serum
screening test is not a diagnostic one, amniocentesis is.
Testing Reveals Tendencies to Develop Ethnic Diseases
Certain genetic configurations are found as a common
feature in certain ethnic groups. When doctors come across patients belonging
to these specific ethnic groups they suggest genetic testing in order to
ascertain whether the person is also a carrier. For instance cystic fibrosis is
very common amongst Caucasians and sickle cell anemia is frequently observed in
people of African descent.
Tests Reveal Hereditary Pattern
The family pedigree is a notebook that can offer
information on this aspect. Say if similar cancer cases are found in two or
more members who are below the age of fifty, it definitely indicates a
hereditary pattern. It is the inherited gene mutation that is at work here.
Genetic tests with the purpose of screening
whether the child is a carrier for disorders or not is not supported by those
who are conscious regarding the ethical connotations of genetic testing.
Testing for specific diseases that are likely to affect their health is fine
but doing a broad testing for all disorders is not feasible. This is because
children are not in a position to decide on their life as whether they want the
test or not.
on Genetic Testing on Children is Delicate