The phrase "a pattern whereby" is correct and usable in written English.
It can be used to describe a specific method or system in which something occurs or is organized.
Example: "The study revealed a pattern whereby students who studied in groups performed better on exams than those who studied alone."
Alternatives: "a method in which" or "a system that allows for".
It's part of a pattern whereby the women's game is – in all respects – reduced.
This established a pattern whereby two Regents, one in each category, completed their terms each even-numbered year.
It therefore needs to dovetail and digress, latching on to a pattern whereby Lucy encounters a new stranger who behaves menacingly, before escaping and bumping into another.
Starting around 2000, they fell into a pattern whereby Glennon would write the lyrics, and McCarthy the music, to create their songs.
This is meant to be reassuring.Critics fear this is all part of a pattern, whereby Mr Tung is slowly eroding Hong Kong's checks and balances.
The results point to a pattern whereby most inventors make only occasional and limited technological contributions and, instead, more significant numbers of new technological discoveries are attributable to a select group of exceptionally inventive individuals.
Interestingly, many of the proteins that were differentially detected among Line A and B birds (Figures 4 7) showed a similar pattern whereby concentration was reduced in Line A birds infected with either E. acervulina or maxima.
For monotone missing data, logistic regression analysis revealed a nonrandom pattern whereby patients with a low previous global health status/QoL score had a higher probability of drop out.
And the years of vicious anti-immigrant hate has led to broader prejudice among the right-wing media audience -- a recent National Hispanic Media Coalition survey found "a consistent pattern whereby Fox News audiences are indeed more likely to hold negative stereotypes about Latinos".
The majority of such genes display a biased pattern whereby the output of a single homoeolocus dominates total gene expression.
Some genes (PDLIM4 and PGR) followed a strict inverse correlation between methylation and expression, but for others (MLH1 and OLIG2), we observed a different pattern whereby high drug concentrations induced a high degree of activation, despite dampening of the hypomethylation response (Fig. 5c), just as observed when carboplatin was added to decitabine.
