00:01
Okay, this question here is showing a karyotype, and it says, what is a karyotype? so a karyotype, well, the answer here is also, is already given.
00:08
It's a diagram that shows the number and appearance of chromosomes in a cell, okay? so particularly, like a photograph of all the chromosome sets of your cells or your genome, okay? and it says, how many autosomes are in this human karyotype and how many sex chromosomes? so you have here 1, 2, 3, 4, you have 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, and 22.
00:43
So you have 22 pairs, it means 44 chromosomes of autosomes, and these two here are sex chromosomes.
00:53
So you have one pair, it means two chromosomes of sex chromosomes that can be either xx for a female or xy in a male.
01:02
Then it says, is the last pair reflects whether the organism is male or female? which would this organism be? so if you are a woman and you are xx, then both chromosomes are going to be identical because both are x chromosomes, right? but if you are xy, then one is going to be x and the other is y, so it is going to be different in shape.
01:21
In this case, you have a different type of chromosome, so this is going to be a karyotype of a male, because this is the x chromosome and this is the y chromosome.
01:29
Then it says, based on the picture, this is a karyotype of a diploid or haploid cell.
01:35
Explain how you know.
01:36
Well, this is a diploid cell.
01:38
Why? well, because when you have a diploid cell, you have two copies of each chromosome.
01:42
This is chromosome number one and this is also chromosome number one.
01:45
If you have a haploid cell, then you would have only one copy of chromosome 1, one copy of chromosome 2, one copy of chromosome 3, and so on...