00:01
So the human cells actually have the presence of telomer.
00:04
Let us represent telomer as tr.
00:07
So the telomer is situated in all the dna, specifically at the end of the chromosome.
00:12
Now this is a repetitive structure.
00:15
So this structure is repetitive and it is repeated about 3 ,000 times.
00:20
Now the sequence that is present in all the human chromosomes at the end of the human chromosomes is tgggg.
00:30
This is the sequence that is present at the end of the chromosome.
00:34
The teloma sequence which is present at the humong chromosome is t -t -a -g -g -g.
00:41
Now this telomer actually has two associated components.
00:46
One is being telomerase.
00:49
I write it as t -s.
00:50
So this is telomerase.
00:52
And second being shelterin.
00:54
Let is represent it as s -h.
00:56
So the telomerase and shelterin particularly have specific functions.
01:00
Now telomerase has a function of adding these repetitive units.
01:05
So these repetitive units, tta, g, g, g, is added at the end of the chromosome by the help of telomerase.
01:14
The addition of this is done by telomerase.
01:19
Specifically, it is added more frequently in egg cells and sperm cells.
01:25
Sperm is represented as sphero, much more than the somatic cells.
01:29
This is because the somatic cell has the lesser requirement of these telomers as compared to the egg cells and the sperm cells...