00:01
Hello everyone in this question we will be discussing about double fertilization in life okay so let us make an oblii okay suppose this is the stigma this is the style and here is the here is placenta to which funicle is attached and to which there is egg set okay this is the chalazel end and this is the micropylarsal end okay suppose here the male gamete the pollen grain is basically pollinated over here at the stigma and then pollen tube formation begins okay pollen tube formation begins and is entered via micropiler end okay so at micropiler end there is philly form apparatus this is philly form apparatus that guides the pollen tube okay then in the for in the egg cell we have at micropiler end we have two we have two synergies which gets degenerated after fertilization and we have one egg cell here okay and then there are two polar nuclei in the center okay and then there is three antipodal cell present at the chalazel and here this is the antipodal cell present at the chalazel and here this is the antipodal cell.
01:51
Okay.
01:51
Antipodal cell.
01:52
Okay.
01:53
Antipodal these are the polar nuclei and this is the egg cell.
02:02
Okay, and these are the synergies.
02:06
Okay, this is the synergy.
02:09
Now what happens is that there are two male gametes, okay? so the first male gamete, suppose this is the first male gamut that is n, that is a haploid cell.
02:22
This fuses, this enters via the pollen tube, this enters via the pollen tube and fertilizes the egg cell.
02:32
So egg cell is also a haploid cell.
02:35
So they both fuse and forms to an zygote, that is a diploid, okay? and then the other male gamut fuses the polar nuclear.
02:48
So there are two polar nuclear present, n and n.
02:54
So when a male gamut enters, it fuses and forms 3n, that is triploids cell...