which of the following disorders results from changes in an individual gene?
a. turner syndromeb. klinefelter syndromec. trisomy 21d. sickle-cell disease

The correct answer for the question that is being presented above is this one: "C. Trisomy 21." Trisomy 21 is a disorder results from changes in an individual gene. Down syndrome (DS or DNS), also known as trisomy 21, is a genetic disorder caused by the presence of all, or part of a third copy of chromosome 21.

Aliving thing consumes berries on a yree

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.