00:01
So, in this question, we are mainly asked for the definition of the epigenetics and also the three different marks of the epigenetics and the importance of it.
00:12
So, basically, epigenetics is the study of the maritimal changes which occur in the gene expression or in the phenotype and it does not involve any changes to the underlying dna sequence.
00:42
And also, it is a field of complex investigation where we can see how the environmental factors and also the lifestyle of the human beings, how they and their choices can convince the regulation of the genes and contribute to the various biological process and the diseases.
01:16
And so, the three main types of epigenetic changes that we will see is the first is the dna methylation.
01:30
So, this works by adding the chemical group to the dna and this chemical group, what it does, it is being added to the specific places on the dna and it blocks the protein that attaches to the dna in order to read the gene.
01:56
And the second type is the histone modification.
02:07
So, in this type, mainly the histones are the proteins which wraps around the dna and when the histones are being tightly packed together, the proteins that read the dna gene, they cannot access to the dna as easily...