Down syndrome is a developmental disorder usually caused by…
Down syndrome is a developmental disorder usually caused by an extra 21st chromosome (Trisomy 21). In other words, most people with Down syndrome have three 21st chromosomes, rather than two. A study in 2011 examined early developmental pruning of retinal ganglion cells in the lateral geniculate nucleus in a mouse model of Down syndrome. Below is a figure from this paper: Which conclusion could you derive from this figure: