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Hello everyone.
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So the question, it says that non -disjunction of chromosomes results in either too many or not enough chromosomes in the gametes.
00:12
So is this true or false? okay.
00:15
So this statement is true.
00:18
First statement, it is true.
00:23
Now, why is this true? let us take a look at that.
00:26
So as non -disjunction results in a different.
00:30
Number of chromosomes from the supposed number as the chromosome it fails to separate during meiosis.
00:38
Now let us take a look at the next up question.
00:41
So the next sub question it says that which is likely to result in more abnormal chromosome numbers in gametes.
00:50
So the correct answer for this is the option which says abnormal separation of chromosomes in meiosis 1.
01:00
So, what happens is when abnormal separation of chromosome and miosis 1, it takes place, it will make 4 out of 4 cells that are the results of non -disjunction having different number of chromosomes than normal.
01:18
But if non -disjunction it happens in meiosis 2, then only 2 cells will be affected.
01:25
Okay, so here all the 4 cells, they are.
01:32
The result of disjunction, okay? but if there was non -disjunction to be taken place, then only two cells will be effect.
01:44
All right.
01:44
Now, let's move on to the next sub -question...