A baby’s genetic makeup is determined when the sperm meets the egg during fertilization. Typically, a full set of DNA is formed, which contains 23 pairs of chromosomes. Sometimes, extra chromosomes ...

Some of human monogenic syndromes associated with high cancer propensity are characterized by an inherent tendency toward chromosome instability and provide an important key to the understanding of ...

Trisomy 18, a conition where a person has three copies of chromosome 18 as opposed to two, is often associated with seizures and congenital heart diseases. Complications from Trisomy 13, where a ...

Robertsonian chromosomes are large chromosomes that form when the long arm of a chromosome breaks and fuses with another chromosome. They are the most common type of chromosome rearrangement in humans ...

Abnormalities in the structure of chromosomes within someone’s genetic makeup are called structural chromosomal abnormalities. Robertsonian translocations are very rare structural chromosomal ...

WASHINGTON — Some cancers are addicted to having extra chromosomes, a study in mice suggests. Cells usually have just two copies of each chromosome — one inherited from mom and one from dad. But about ...

If you’re pregnant, your doctor might have mentioned an NT scan or first-trimester screening. An NT scan is a simple test that shows your baby’s risk for some genetic conditions. What Is an NT Scan ...