Aperson with down syndrome has an additional #21 chromosome in every somatic cell. this condition is also called trisomy 21. the cause of this syndrome

The answer is C.) Is through the union of a normal gamete with a haploid amount of chromosomes (n) and another gamete with an extra #21 (n+1)

the calvin cycle has three stages. in stage 1, the enzyme rubisco incorporates carbon dioxide into an organic molecule. in stage 2, the organic molecule is reduced. in stage 3, rubp, the molecule that starts the cycle, is regenerated so that the cycle can continue