Down syndrome is caused by a translocation of chromosomes 15 and 21 (Figure 3), in which the long arms of two acrocentric chromosomes are translocated to produce a single long chromosome ...

24, 2024 — Researchers have identified a gene that causes heart defects in Down syndrome, a condition that results from an additional copy of chromosome 21. Reducing the overactivity of this ...

However, Down syndrome is characterized by a third copy of chromosome 21, which does not apply to tigers as they possess a different chromosomal structure (19 chromosomes) than humans. Although ...