answersLogoWhite

0

Different kinds of tests are:

Serum screening

This is a blood test performed at 15 to 20 weeks. It measures the levels of pregnancy hormones in the mother's blood. By combining these results with the mother's age, then it is possible to calculate the risk of the baby having Down's syndrome. If the woman is considered low risk after the blood test, then nothing further is usually necessary. If the result suggests she is at high risk of having an affected baby, she will be offered an amniocentesis test to see whether the baby is affected or not. The blood test is not foolproof and, occasionally, a Down's baby will be born to a mother with a low-risk result. A high-risk result does not mean that the baby is affected, it just means that the woman may wish to consider a diagnostic test. Nuchal translucency measurement

Using ultrasound at 11 to 14 weeks it is possible to measure the fluid space at the back of the fetus' neck. Down's babies have a bigger space than unaffected pregnancies. By combining this measurement with the mother's age and sometimes with hormone measurements in the mother's blood, it is possible to calculate the risk of carrying an affected baby. Again, if the risk is high then the woman may consider a diagnostic test. Diagnostic tests

A chromosome abnormality can only be made with certainty by analysing cells from the fetus in the genetics laboratory. A diagnostic test is performed when: * a woman is considered at high risk because of the screening test. * a woman is considered at high risk because she has previously had a pregnancy affected by a chromosomal or genetic disorder. * an ultrasound examination has detected features or abnormalities indicating an increased risk of a chromosome abnormality. * a woman requests it because she is concerned that her baby has a chromosome abnormality. * There are two types of diagnostic test - amniocentesis and chorion villous biopsy (CVS). Which of these tests a woman is offered will vary according to the hospital in which she plans to give birth. It is important that the mother understands the implications and the purpose of these tests.

User Avatar

Wiki User

18y ago

What else can I help you with?

Continue Learning about Natural Sciences

An abnormal condition that a person inherits through genes or chromosomes is a?

An abnormal condition that a person inherits through the chromosomes or genes is a genetic disorder.


Why might Cells from an advanced malignant tumor most often have very abnormal chromosomes and often an abnormal total number of chromosomes?

The abnormal chromosomes in cells from advanced malignant tumors are a result of genomic instability, a common feature of cancer cells. This instability can lead to chromosome mutations and aneuploidy, where cells have an abnormal number of chromosomes. These abnormalities can drive tumor progression by promoting genetic diversity and enabling the cells to acquire advantageous mutations for survival and growth.


How can karyotypes detect non disjunction?

Karyotypes can detect non disjunction by showing abnormal chromosome numbers. Non disjunction occurs when chromosomes fail to separate properly during cell division, leading to an imbalance of chromosomes in the resulting cells. Karyotypes can be analyzed to identify any extra or missing chromosomes, indicating the occurrence of non disjunction.


What is the medical term meaning abnormal condition of meiosis?

The medical term for an abnormal condition of meiosis is meiotic non-disjunction, which refers to the failure of chromosomes to separate properly during meiosis, resulting in an abnormal number of chromosomes in the resulting gametes. This can lead to conditions such as Down syndrome.


The correct number of chromosomes in a species is known as aneuploidy?

Aneuploidy refers to an abnormal number of chromosomes in a cell, typically due to errors in cell division. The correct number of chromosomes in a species is known as euploidy, where cells have a normal set of chromosomes.

Related Questions

Why a person with Down's syndrome has an abnormal number of chromosomes?

Yes.


An abnormal condition that a person inherits through genes or chromosomes is a?

An abnormal condition that a person inherits through the chromosomes or genes is a genetic disorder.


Why might Cells from an advanced malignant tumor most often have very abnormal chromosomes and often an abnormal total number of chromosomes?

The abnormal chromosomes in cells from advanced malignant tumors are a result of genomic instability, a common feature of cancer cells. This instability can lead to chromosome mutations and aneuploidy, where cells have an abnormal number of chromosomes. These abnormalities can drive tumor progression by promoting genetic diversity and enabling the cells to acquire advantageous mutations for survival and growth.


Explain how nondisjunction results in cells with abnormal numbers of chromosomes?

Nondisjunction results in cells with abnormal numbers of chromosomes due to chromosomes not separating properly in meiosis. this causes some cells to end up with to many chromosomes and others to end up with not enough chromosomes. It messes up cell division and development and can lead to death or genetic disorders like down syndrome.


What chromosomes are affected by colon cancer?

Well, Cancer is when abnormal cells divide out of control. The chromosomes are the DNA that controls Cell Division


How can karyotypes detect non disjunction?

Karyotypes can detect non disjunction by showing abnormal chromosome numbers. Non disjunction occurs when chromosomes fail to separate properly during cell division, leading to an imbalance of chromosomes in the resulting cells. Karyotypes can be analyzed to identify any extra or missing chromosomes, indicating the occurrence of non disjunction.


What is the medical term meaning abnormal condition of meiosis?

The medical term for an abnormal condition of meiosis is meiotic non-disjunction, which refers to the failure of chromosomes to separate properly during meiosis, resulting in an abnormal number of chromosomes in the resulting gametes. This can lead to conditions such as Down syndrome.


What condition does a parathyroidectomy treat?

Parathyroidectomy is usually performed to treat hyperparathyroidism (abnormal over-functioning of the parathyroid glands).


Why is abnormal psychology part of clinical psychology?

Because clinical psychologists are typically trained to treat people with abnormal psychological conditions.


The correct number of chromosomes in a species is known as aneuploidy?

Aneuploidy refers to an abnormal number of chromosomes in a cell, typically due to errors in cell division. The correct number of chromosomes in a species is known as euploidy, where cells have a normal set of chromosomes.


Where does nondisjunction occur in the process of cell division?

Nondisjunction occurs during the separation of chromosomes in either meiosis or mitosis, leading to an abnormal number of chromosomes in the resulting cells.


What occurs during nondisjunction?

Nondisjunction is a chromosomal abnormality that results in the failure of homologous chromosomes or sister chromatids to separate properly during cell division. This can lead to an uneven distribution of chromosomes in daughter cells, causing genetic disorders or conditions such as Down syndrome.