00:01
This question is asking for the definition of a bivant.
00:04
So let's go through a little of the background information on chromosomes.
00:09
So humans have 23 sets of chromosomes.
00:16
I'm not going to draw all of them, but know that there are 23 pairs.
00:20
But then for each chromosome, you actually inherit one copy from your mom, the maternal copy and another copy from your dad, the paternal chromosome.
00:33
So for chromosome 1, let's draw the maternal and paternal homologous chromosomes.
00:40
And let's go to chromosome 2, maternal and paternal copies, and then right on the line to chromosome 3.
00:47
So if you look at the chromosomes in a cell, you'll actually end up seeing 46 of them, because there's 23 pairs.
00:56
But you should know that i've color -coded these to show that even though it looks like there's going to be 46 in a diploid cell, they always show up in homologous pairs.
01:11
So the genes on this chromosome are the same genes on this chromosome, even if they're different alleles.
01:18
Now, prior to cell division and prior to meiosis, this dna is going to be replicated or copied so that it can end up in more than one...