How can we use genetic information to predict the risk of specific health complications in individuals with Down syndrome?

Trisomy 21 is a genetic condition caused by an extra chromosome. Most babies inherit 23 chromosomes from each parent, for a total of 46 chromosomes. Most cases of Down syndrome are caused by trisomy 21. Occasionally, the extra chromosome #21 or a portion of it is attached to another chromosome in the egg or ... Physical signs of Down syndrome · A flat nose bridge. · Slanted eyes that point upward. · A short neck. · Small ears, hands and feet. · Weak muscle tone at ... Oct 20, 2023 ... Down syndrome is a genetic disorder caused by an extra full or partial cell division of a human's chromosome 21, resulting in lifelong intellectual disability, ... Nov 12, 2024 ... Down syndrome results from an unusual cell division involving chromosome 21. This unusual cell division results in an extra partial or full ... Due to weak muscle tone, the kneecaps of a child with Down syndrome may slip out of the groove. This instability will cause the knees to look deformed, but may ... Down syndrome is caused by an extra chromosome, but experts are not certain why this occurs or what factors may play a role. One factor experts do know about is ... Sensory sensitivities can also cause behavioral challenges. Behavioral challenges. Has frequent tantrums, “melt-downs," or “drop and flops” (e.g., when ... What is Down syndrome? Down syndrome is caused by the presence of an extra chromosome number 21 in the cells of the developing baby. Down syndrome is a genetic disorder. It is also called trisomy 21. It includes certain birth defects, learning problems, and facial features.