If I had a plant, with a trait of tall height, and it self pollinated, this means that all of its offspring will be. A. a mix of tall and short
B. all tall
C. all short

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.