Why did the f1 offspring of mendel's classic pea cross always look like one of the two parental varieties?

Aboy with an extra x chromosome probably has which of the following syndromes?

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

The chemical form of energy that is useable by the cell to do work