Question: Technical and Biological replicates
gravatar for debitboro
4.4 years ago by
debitboro180 wrote:

Hi all,

I apologize if the question is so naive (I'm a computer sciences engineer and I have not enough notions in biology and lab experiments). I have RNASeq data coming from the sequencing of 22 patients, for each patient two tissues are sequenced the normal and the tumor tissue, so we have 44 samples (22 tumors, 22 matched normal).

My question is about technical and biological replicates. In my case can I say that we have technical replicates if we consider a single patient because the two samples are grown in the same biological conditions (so, one tissue in control and one tissue in case condition), and biological replicates if we focus on all the patients because the samples are grown in different biological conditions (so, we have 22 replicates in each condition case and control).

Is this correct ?

ADD COMMENTlink modified 2.9 years ago by realnewbie20 • written 4.4 years ago by debitboro180
gravatar for natasha.sernova
4.4 years ago by
natasha.sernova3.7k wrote:

See these post:

Technical Or Biological Replicate

and this paper:

It may be also useful - RNA-experimental design:

ADD COMMENTlink modified 4.4 years ago • written 4.4 years ago by natasha.sernova3.7k
gravatar for Chirag Parsania
4.4 years ago by
Chirag Parsania1.9k
University of Macau
Chirag Parsania1.9k wrote:


As per my understanding you neither have technical nor biological replicates. If you have two same tumour type (for e.g. two blood cancer tumour) you can say they are biological replicates.

as name suggest technical replicates generally people do to check variation due to technical issues like library preparation or sequencing bias ness or sequencing error. In that case two library for same biological sample is been prepared and sequenced side by side in same sequencer.

Hope this helps Chirag

ADD COMMENTlink written 4.4 years ago by Chirag Parsania1.9k
gravatar for realnewbie
2.9 years ago by
realnewbie20 wrote:

Technical and Biological Replicates clearly explained here. -Yes,induuude

ADD COMMENTlink written 2.9 years ago by realnewbie20
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