Molecular tool demonstrates how bad eggs are identified for destruction by reproductive system
The biological factory that produces reproductive cells has a robust quality control system to identify and eliminate eggs ...
Nature6y
Trisomy 21 karyotype
What is the structure of a chromosome? Why does the total number of chromosomes in a cell matter? Learn how chromosomes self-organize within single cells, and how these patterns help us detect ...
Howard Hughes Medical Institute16y
HHMI researchers devise prenatal blood test that accurately detects Down syndrome and two other serious chromosomal defects.
Down syndrome, for example, is caused by a trisomy—three copies instead of two—of chromosome 21. Amniocentesis and chorionic villus sampling (CVS), which are currently considered the “gold standard” ...
WebMD27d
What Are Translocations?
For example, a person may have a balanced translocation between chromosomes 7 and 21. The q arms of each chromosome have been switched. But this person has all the genetic material required for ...