Part 1: crossing beak color and tail-feather length cross a yyll (heterozygous parent with dominant traits) with yyll (homozygous parent with recessive traits). look at the number of phenotypes of the f1 generation: yyll: 400 yyll: 100 yyll: 100 yyll: 400 how far apart are y and l? give your answer in map units. question 2 options: 20 map units 80 map units 100 map units 400 map units

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.