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Why can't this be 1st meiotic division non-disjunction as well?

The child has gotten 2 "sick" chromosomes from his dad and 1 healthy from his mom, leaving it with trisomy 13. I can see how this can happen in the second meiotic division of the father but I can ...
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CRISPR Knock in

Using the CRISPR/Cas9 technology, it is possible that after inducing a DSB with the Cas9 endonuclease guided with an RNA designed by the user and using a template DNA, get a desired Knock-In (KI) by ...
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His Tag location in gene circuit

I am part of an undergraduate research group and we are trying to produce a protease in an E.coli gene circuit. We are not sure where to place the His tag in our circuit. The sequence is ...
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Immediate Early Genes during sleep

In Neuroscience 3rd ed by Bear et al. on page 607, immediate early genes are described as related to changing synaptic strength, yet have decreased expression during sleep. The explanation given is ...
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minimum ratio of the shortest isoform to the longest one derived from one same parent gene

I want to know what is the minimum percentage of the shortest isoform/transcript to the longest one that derived from the same parent gene? Does it have organism specificity? What is the function of ...