That would be 1/16 which is 6.25%. The offspring have to be rryy.
There are 2 ways of thinking about this and other dihybrid crosses
—> the ratio of different genotypes is (9:3:3:1) for a dihybrid cross so the probability of wrinkled and green offspring is 1/16 (9+3+3+1=16)
—-> we can think of them as 2 monohybrid crosses. One RrxRr and one YyxYy. The probability of getting wrinkled(rr) is 1/4. The probability of getting green(yy) is 1/4. So the probability of wrinkled AND green is 1/4*1/4=1/16
The answer is soil erosion
The cells which are involved in dissolving bone tissues are osteoclasts. Osteoclasts are bone dissolving cells found on bone surfaces. They are formed from the fussion of hemocytoblasts; they are multi nucleated and large. Osteoclasts typically move over the surface of the bone matrix and secrete acids and enzymes that disintegrate it, forming little pits on the surface of the bones.
I'm not exactly sure what makes fossils but they used to not have hard bodied organisms they were soft.