Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Figure 1A: Index child with Down phenotype; Figure 1B: Karyotyping analysis revealed 45 autosomes and three sex chromosomes with the presence of double aneuploidy: extra sex chromosome X (XXY pattern) and extra chromosome 21, consistent (marked in boxes) with Down-Klinefelter Syndrome (48,XXY,+21).
