COVID-19’s danger lay in its invisibility. The SARS-CoV-2 virus is highly contagious and can be passed on by people with light or no symptoms, making it extremely difficult to track and contain. But ...
Small supernumerary marker chromosomes are estimated to occur in 1.5 per 1,000 livebirths. One of the most common chromosome markers is the inv dup (15), which may represent as many as 50% of the ...