QUESTION 20 2 points For a 2-fold up regulation, the log-base? of the gene expression ratio between 2 conditions must be than while for a 2-fold down regulation, the log-base? of the gene expression ratio between 2 conditionsmust be than QUESTION 21 1 points In order to find patterns of gene expression in a microarray or RNA-seg experiment, one can perform unsupervised learning using [x] QUESTION 22 1 points When two different technicians process samples in an experiment, there may be large differences in expression measurements This is called the (x] effect