1 00:00:01,470 --> 00:00:03,060 So if we think about our nuclear 2 00:00:03,060 --> 00:00:07,770 chromosomes, and our mitochondrial chromosomes, that includes everything 3 00:00:07,770 --> 00:00:14,370 that you see here in this picture. All of this is the total cellular genome, for 4 00:00:14,370 --> 00:00:18,410 the total human genome. Now when I say the total human genome in this case, I'm 5 00:00:18,410 --> 00:00:22,600 not referring to any individual human in particular. 6 00:00:22,600 --> 00:00:26,790 I'm just referencing The constituent parts, or chromosomes, 7 00:00:26,790 --> 00:00:28,590 that all play a role in making a 8 00:00:28,590 --> 00:00:33,060 human. For example, we know that chromosome one, two, 9 00:00:33,060 --> 00:00:35,270 three, four, five, six, seven, alright, all the way 10 00:00:35,270 --> 00:00:38,160 down to the chromosome 22 and the sex chromosomes 11 00:00:38,160 --> 00:00:42,650 and the mitochondrial chromosome is important in making a 12 00:00:42,650 --> 00:00:46,470 human. Now for just a moment, don't count extra 13 00:00:46,470 --> 00:00:48,970 copies of chromosomes. I want you to tell me 14 00:00:48,970 --> 00:00:52,230 how many unique chromosomes are there in the total 15 00:00:52,230 --> 00:00:57,590 cellular genome. Remember, I don't want you to count extra copies of 16 00:00:57,590 --> 00:01:02,510 chromosomes. I want you to tell me how many unique chromosomes are there? It can 17 00:01:02,510 --> 00:01:05,820 be a little tricky, so think about it before you answer. And I 18 00:01:05,820 --> 00:01:09,530 want you to put your answer in number form in this text box here.