https://ghr.nlm.nih.gov/primer/mutationsanddisorders/chromosomalconditions

6 days ago ... A common form of aneuploidy is trisomy, or the presence of an extra chromosome in cells. "Tri-" is Greek for "three"; people with trisomy have ...

https://ghr.nlm.nih.gov/condition/48xxyy-syndrome

6 days ago ... 48,XXYY syndrome is a chromosomal condition that causes ... Adolescent and adult males with this condition typically have small testes that do ...

https://www.genome.gov/11508982/chromosome-abnormalities-fact-sheet/

Jan 6, 2016 ... The typical number of chromosomes in a human cell is 46: 23 pairs, ... of the chromosome is duplicated, resulting in extra genetic material.

https://www.genome.gov/about-genomics/fact-sheets/Chromosome-Abnormalities-Fact-Sheet

Jan 6, 2016 ... The typical number of chromosomes in a human cell is 46: 23 pairs, ... of the chromosome is duplicated, resulting in extra genetic material.

https://learn.genetics.utah.edu/content/disorders/extraormissing/

People with monosomy are missing a chromosome. So, for a particular chromosome, only one is present instead of two. People with trisomy have an extra copy ...

https://www.biology.iupui.edu/biocourses/N100/2k2humancsomaldisorders.html

Apr 30, 2003 ... I. Karyotype Analysis of Human Chromosomes. 1. Karyotype ... A. Down syndrome (trisomy 21): The result of an extra copy of chromosome 21.

https://www.verywellhealth.com/other-trisomies-in-humans-1120490

Dec 9, 2018 ... chromosomes, human karyotype, down's syndrome, trisomy 21. SMC Images ... the newly divided chromosome will have extra genetic material.

https://en.wikipedia.org/wiki/XXYY_syndrome

XXYY syndrome is a sex chromosome anomaly in which males have an extra X and Y chromosome. Human cells usually contain two sex chromosomes, one ...

https://www.babycenter.com/404_what-does-it-mean-when-a-baby-has-an-extra-chromosome_5279.bc

Many people with Down syndrome have rich and fulfilling lives into adulthood. Other babies with chromosomal abnormalities have trisomy 13 or 18, which are ...

https://sciencing.com/happens-child-born-extra-chromosome-23rd-pair-15692.html

Apr 16, 2018 ... The human genome is made up of a total of 23 chromosomes: 22 autosomes, which occur in matched pairs, and 1 set of sex chromosomes.