Different versions of a gene, like brown or white fur color, are called what?

Last week i was assigned a thematic. we have groups of three but the people i was assigned with haven't been in school for days. i would appreciate if anyone can me with my thematic . i highlighted most of the important steps and i circled my thematic topic. in desperate need : ( its due on february 19

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not

10. which person would be the least effective host for a pathogen? an older person a young athlete a smoker a sick person