0:00
Hello everyone.
00:01
So, as here we know that the basic chromosome number, chromosome number of lilium, okay, of particularly we can say lilium is actually equal to like n and that n is equal to 12.
00:24
Okay then we can say that the tetrad what is this tetrad this tetrad this tetrad is a pair of homologous chromosome pair of homologous chromosomes okay now if we just check for the lilia so a lilium cell a of lilium cell undergoing the meiosis process, which is undergoing the meiosis.
01:02
This actually contains 12 tetrads.
01:07
This will always contain 12 tetrads.
01:14
And also, if we just check over here, each tetrad is equal to two chromosomes.
01:19
Each tetrad is equal to two chromosomes.
01:25
Therefore, we can say that like one tetral.
01:30
And so each chromosome contains two sister chromatids means one chromosome, one chromosome is equal to two sister chromatics.
01:44
Okay.
01:47
Now the next part.
01:48
In the next part, we can just say that the crossing over.
01:51
So, this was the first part.
01:54
Now, the second part, there is the crossing over.
02:01
The crossing over actually occurs between two non -sister chromatids.
02:15
But the condition is of the homologous pair of the chromosome, of the homologous pair of chromosome okay chromosomes now the next part of the question so in the next part of the question we can just say that the ploidy now what is the ploydie ploidy is actually the number of set of chromosome present in an organism okay.
03:00
Then here we have the haploid...