position effect vs upshot

position effect and upshot both are nouns.

Word	Noun	Adjective	Verb	Adverb
position effect	Yes	No	No	No
upshot	Yes	No	No	No

As nouns, upshot is a hypernym of position effect; that is, upshot is a word with a broader meaning than position effect:

position effect: (genetics) the effect on the expression of a gene that is produced by changing its location in a chromosome
upshot: a phenomenon that follows and is caused by some previous phenomenon

Other hypernyms of position effect include consequence, effect, event, issue, outcome, result.

position effect (noun)	upshot (noun)
(genetics) the effect on the expression of a gene that is produced by changing its location in a chromosome	a phenomenon that follows and is caused by some previous phenomenon