Karen and steve each have a sibling with sickle-cell disease. neither karen nor steve nor any of their parents have the disease, and none of them have been tested to see if they have the sickle-cell trait. based on this incomplete information, calculate the probability that if this couple has a child, the child will have sickle-cell disease. express your answer as a fraction using the slash symbol and no spaces (for example, 1/16).

mountains can affect the climate of nearby lands. in some areas, mountains block rain, so that one side of a mountain range may be rainy and the other side may be a desert. much of airborne moisture falls as rain on the windward side of mountains.

explanation:

i don't know, but does anyone wanna be friends? i'm doing my homework at 1: 49 in the morning : /

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.

what exactly is the question lol