EK BIO pg 25 error?

[dreamer67]

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On page 25 it states that unique sequence DNA dominates. However, isn't it repetitive sequence DNA, or non-coding DNA, that dominates? At least that is what I was taught in genetics...😕

 

[CodeBlu]

On page 25 it states that unique sequence DNA dominates. However, isn't it repetitive sequence DNA, or non-coding DNA, that dominates? At least that is what I was taught in genetics...😕

Keep reading further down. Unique sequence DNA is found in euchromatin (aka actively transcribed), repetitive sequence DNA is found in heterochromatin (aka not actively transcribed). Ergo... unique sequence DNA dominates in transcription.

 

[dreamer67]

Keep reading further down. Unique sequence DNA is found in euchromatin (aka actively transcribed), repetitive sequence DNA is found in heterochromatin (aka not actively transcribed). Ergo... unique sequence DNA dominates in transcription.

It says genes are referred to as unique sequence and regions of non-coding DNA are repetitive sequence. Genes being transcribed are in euchromatin, but heterochromatin also contains genes (AKA unique sequence), but they aren't being actively transcribed. So I still don't understand why unique sequence predominates. Further down the page though it says 1% of genome codes for protein, which makes sense.

 

[CodeBlu]

It says genes are referred to as unique sequence and regions of non-coding DNA are repetitive sequence. Genes being transcribed are in euchromatin, but heterochromatin also contains genes (AKA unique sequence), but they aren't being actively transcribed. So I still don't understand why unique sequence predominates. Further down the page though it says 1% of genome codes for protein, which makes sense.

I think you're looking into this a little too much. Your genetics background stating that most of the DNA is junk DNA and not transcribed, is correct.

 

[dreamer67]

lol I tend to pay way too much attention to small details and to over think things a lot, but I got a 14 on 30 minute exam 1!!! (the one i got wrong was due to over thinking) so hopefully it's paying off

I think you're looking into this a little too much. Your genetics background stating that most of the DNA is junk DNA and not transcribed, is correct.