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Despite the many complications and challenges, most babies with Down syndrome can grow up to lead productive, fulfilling lives. With early intervention, many children attend mainstream schools and ...
Down syndrome or Down's syndrome, [12] also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability , and characteristic physical features.
A non-flipped image of a right-handed Cartesian coordinate system, illustrating the x (right-left), y (forward-backward) and z (up-down) axes relative to a human being.Body relative directions (also known as egocentric coordinates) [1] are geometrical orientations relative to a body such as a human person's body or a road sign.
An anaphase lag of a chromosome 21 in a Down syndrome embryo leads to a fraction of euploid cells (2n cells), phenomenon described as "aneuploidy rescue". There is considerable variability in the fraction of cells with trisomy 21, both as a whole and tissue-by-tissue. This is the cause of 1–2% of the observed Down syndromes. [4]
The axial twist theory (a.k.a. axial twist hypothesis) is a scientific theory that has been proposed to explain a range of unusual aspects of the body plan of vertebrates (including humans). [1] It states that the rostral part of the head is "turned around" regarding the rest of the body. [ 2 ]
March 21 (3/21) is World Down Syndrome Day, chosen because people with Down Syndrome have three copies of the 21st chromosome instead of the usual two. "Gabe lives his life to the fullest," Nick ...
The inclination of Earth's orbit drifts up and down relative to its present orbit. This three-dimensional movement is known as "precession of the ecliptic" or "planetary precession". Earth's current inclination relative to the invariable plane (the plane that represents the angular momentum of the Solar System—approximately the orbital plane ...
DOOR syndrome; Dopamine dysregulation syndrome; Down syndrome; Dravet syndrome; Dressler syndrome; Drug reaction with eosinophilia and systemic symptoms; Dry eye syndrome; Duane syndrome; Duane-radial ray syndrome; Dubin–Johnson syndrome; Dubowitz syndrome; Dumping syndrome; Dysexecutive syndrome; Dyskeratosis congenita; Dysplastic nevus syndrome