00:01
Not to answer this question, let's talk about chromosomes.
00:04
Okay, it says, a baby has been clinically diagnosed with turner's syndrome.
00:08
That is a monosomy of x, okay, but no cryotype has been performed.
00:12
Remember that for turner's syndrome, the carotype is 45x0.
00:16
Because instead of having either two x chromosomes or one x and one one one, you have only one x chromosome and you miss one x chromosome.
00:24
So it says, but no cryotype has been performed.
00:27
A carotty is subsequently performed and it is discovered the baby has two copies of the x chromosome, but it's expressing all the symptoms of tarners.
00:35
So in this case, arguably, this person is not like this.
00:38
It is 46x, but it is displaying the science and the clinical findings of turner syndrome.
00:47
And it says, which of the following is a possible explanation? so according to these options, the most probable answer is option one, okay, that says instead of being randomly inactivated early in development, all of the paternal x chromosomes have been inactivated...