[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.38,0:00:01.56,Default,,0000,0000,0000,,- [Voiceover] In the last video,
Dialogue: 0,0:00:01.56,0:00:04.46,Default,,0000,0000,0000,,we had just started to get into meiosis,
Dialogue: 0,0:00:04.46,0:00:06.40,Default,,0000,0000,0000,,and to be more precise, meiosis I,
Dialogue: 0,0:00:06.40,0:00:08.96,Default,,0000,0000,0000,,and to be even more precise\Nthan that, prophase I,
Dialogue: 0,0:00:08.96,0:00:11.02,Default,,0000,0000,0000,,but we spent a good bit\Nof time on prophase I
Dialogue: 0,0:00:11.02,0:00:12.78,Default,,0000,0000,0000,,because some interesting things happened.
Dialogue: 0,0:00:12.78,0:00:15.20,Default,,0000,0000,0000,,Some things happened just\Nlike prophase in mitosis where
Dialogue: 0,0:00:15.20,0:00:19.23,Default,,0000,0000,0000,,the nuclear envelope disappears\Nor starts to disappear,
Dialogue: 0,0:00:19.23,0:00:23.02,Default,,0000,0000,0000,,you have the chromosomes\Ngoing into their dense form
Dialogue: 0,0:00:23.02,0:00:24.70,Default,,0000,0000,0000,,that has kinda this classic shape that you
Dialogue: 0,0:00:24.70,0:00:26.50,Default,,0000,0000,0000,,could see from a microscope,
Dialogue: 0,0:00:26.50,0:00:29.40,Default,,0000,0000,0000,,but what was unique or\Nwhat was interesting
Dialogue: 0,0:00:29.40,0:00:32.82,Default,,0000,0000,0000,,about meiosis I and\Nprophase I in particular
Dialogue: 0,0:00:32.82,0:00:35.48,Default,,0000,0000,0000,,is that you have this\Nchromosomal crossover,
Dialogue: 0,0:00:35.48,0:00:39.48,Default,,0000,0000,0000,,that is a pretty typical\Nthing to happen in meiosis I,
Dialogue: 0,0:00:39.48,0:00:43.30,Default,,0000,0000,0000,,and it tends to happen\Nin a fairly clean way
Dialogue: 0,0:00:43.30,0:00:47.24,Default,,0000,0000,0000,,where homologous sections\Nof these homologous pairs
Dialogue: 0,0:00:47.24,0:00:51.33,Default,,0000,0000,0000,,crossover, so these\Nsections of the chromosome
Dialogue: 0,0:00:51.33,0:00:54.14,Default,,0000,0000,0000,,tend to code for the same genes.
Dialogue: 0,0:00:54.14,0:00:55.89,Default,,0000,0000,0000,,They're just different\Nvariants of those same genes.
Dialogue: 0,0:00:55.89,0:00:57.34,Default,,0000,0000,0000,,They might have different alleles,
Dialogue: 0,0:00:57.34,0:00:59.65,Default,,0000,0000,0000,,and then once again, this\Njust adds more variation
Dialogue: 0,0:00:59.65,0:01:02.28,Default,,0000,0000,0000,,as we get into sexual reproduction,
Dialogue: 0,0:01:02.28,0:01:04.97,Default,,0000,0000,0000,,so it's a kind of neat\Nthing that happens here.
Dialogue: 0,0:01:04.97,0:01:07.04,Default,,0000,0000,0000,,But now let's continue with meiosis,
Dialogue: 0,0:01:07.04,0:01:09.72,Default,,0000,0000,0000,,and in particular meiosis\NI, and you could guess
Dialogue: 0,0:01:09.72,0:01:11.99,Default,,0000,0000,0000,,what the next phase is going to be called.
Dialogue: 0,0:01:11.99,0:01:16.99,Default,,0000,0000,0000,,It is metaphase I, metaphase, metaphase I,
Dialogue: 0,0:01:17.55,0:01:21.81,Default,,0000,0000,0000,,and it has some similarities\Nwith metaphase in mitosis.
Dialogue: 0,0:01:21.81,0:01:24.94,Default,,0000,0000,0000,,So in metaphase I, let me draw my cell,
Dialogue: 0,0:01:25.73,0:01:30.23,Default,,0000,0000,0000,,so this is the cellular\Nmembrane right over there.
Dialogue: 0,0:01:30.23,0:01:32.41,Default,,0000,0000,0000,,I have my centrosomes,\Nwhich are now going to play
Dialogue: 0,0:01:32.41,0:01:34.80,Default,,0000,0000,0000,,more significant roles.
Dialogue: 0,0:01:35.15,0:01:38.03,Default,,0000,0000,0000,,The nuclear membrane is now gone,
Dialogue: 0,0:01:38.03,0:01:41.53,Default,,0000,0000,0000,,and just like in metaphase in mitosis,
Dialogue: 0,0:01:41.53,0:01:43.67,Default,,0000,0000,0000,,my chromosomes are going to line up
Dialogue: 0,0:01:43.67,0:01:48.22,Default,,0000,0000,0000,,along the, here I'll draw it,\Nkind of this up, down axis.
Dialogue: 0,0:01:48.22,0:01:49.60,Default,,0000,0000,0000,,So let's do that.
Dialogue: 0,0:01:49.60,0:01:52.96,Default,,0000,0000,0000,,So you have this one right over here.
Dialogue: 0,0:01:53.77,0:01:57.18,Default,,0000,0000,0000,,This is one chromosome,\Ntwo sister chromatids,
Dialogue: 0,0:01:57.24,0:01:58.90,Default,,0000,0000,0000,,and we had the chromosomal crossover,
Dialogue: 0,0:01:58.90,0:02:00.51,Default,,0000,0000,0000,,so it has a little bit of pink here.
Dialogue: 0,0:02:00.51,0:02:01.28,Default,,0000,0000,0000,,I'm gonna take a little bit of time
Dialogue: 0,0:02:01.28,0:02:03.19,Default,,0000,0000,0000,,to switch colors a little\Nbit more frequently.
Dialogue: 0,0:02:03.19,0:02:05.68,Default,,0000,0000,0000,,And then you have the one,\Nat least most of which
Dialogue: 0,0:02:05.68,0:02:07.79,Default,,0000,0000,0000,,you got from your mother,
Dialogue: 0,0:02:07.97,0:02:09.06,Default,,0000,0000,0000,,yeah but there's been a little bit
Dialogue: 0,0:02:09.06,0:02:12.13,Default,,0000,0000,0000,,of chromosomal crossover here as well.
Dialogue: 0,0:02:12.29,0:02:14.10,Default,,0000,0000,0000,,So let me draw that.
Dialogue: 0,0:02:14.40,0:02:15.59,Default,,0000,0000,0000,,Let me draw that.
Dialogue: 0,0:02:15.59,0:02:17.00,Default,,0000,0000,0000,,And then you have this one,
Dialogue: 0,0:02:17.00,0:02:19.08,Default,,0000,0000,0000,,and just for the sake of,
Dialogue: 0,0:02:19.08,0:02:23.22,Default,,0000,0000,0000,,so you have this one, this\Nchromosome from your father.
Dialogue: 0,0:02:23.62,0:02:26.69,Default,,0000,0000,0000,,It has replicated, so it's\Nnow two sister chromatids.
Dialogue: 0,0:02:26.72,0:02:27.66,Default,,0000,0000,0000,,And this one from your mother,
Dialogue: 0,0:02:27.66,0:02:30.23,Default,,0000,0000,0000,,and I'm not gonna show the\Nchromosomal crossover here.
Dialogue: 0,0:02:30.23,0:02:32.17,Default,,0000,0000,0000,,Maybe it didn't happen over here.
Dialogue: 0,0:02:32.52,0:02:34.82,Default,,0000,0000,0000,,No homologous recombination over here.
Dialogue: 0,0:02:35.31,0:02:37.36,Default,,0000,0000,0000,,So these are, I guess, shorter.
Dialogue: 0,0:02:38.25,0:02:40.38,Default,,0000,0000,0000,,Now let me draw the centromeres.
Dialogue: 0,0:02:40.60,0:02:43.10,Default,,0000,0000,0000,,The centromeres I started\Ndoing in this blue color.
Dialogue: 0,0:02:43.45,0:02:47.44,Default,,0000,0000,0000,,So the centromeres, the centromeres,
Dialogue: 0,0:02:47.44,0:02:48.82,Default,,0000,0000,0000,,and then the centrosomes,
Dialogue: 0,0:02:48.82,0:02:51.26,Default,,0000,0000,0000,,you have these microtubules that start,
Dialogue: 0,0:02:51.26,0:02:54.30,Default,,0000,0000,0000,,they can push the centrosomes\Naway from each other.
Dialogue: 0,0:02:54.30,0:02:58.53,Default,,0000,0000,0000,,But they also attach at the\Nkinetochores to the chromosomes,
Dialogue: 0,0:02:58.53,0:03:01.63,Default,,0000,0000,0000,,to the chromosomes, just like that.
Dialogue: 0,0:03:01.63,0:03:05.15,Default,,0000,0000,0000,,And these are, the microtubules,\Nyou'll see people talk
Dialogue: 0,0:03:05.15,0:03:07.40,Default,,0000,0000,0000,,about oh these connect, and they're able
Dialogue: 0,0:03:07.40,0:03:08.22,Default,,0000,0000,0000,,to move things around,
Dialogue: 0,0:03:08.22,0:03:10.58,Default,,0000,0000,0000,,but I find this incredible\Nthat you just have
Dialogue: 0,0:03:10.58,0:03:13.45,Default,,0000,0000,0000,,a bunch of proteins through\Njust kind of chemical
Dialogue: 0,0:03:13.45,0:03:17.99,Default,,0000,0000,0000,,and thermodynamic processes,
Dialogue: 0,0:03:17.99,0:03:19.90,Default,,0000,0000,0000,,are able to do really interesting things
Dialogue: 0,0:03:19.90,0:03:24.68,Default,,0000,0000,0000,,like move chromosomes to\Ndifferent parts of the cell,
Dialogue: 0,0:03:24.68,0:03:27.40,Default,,0000,0000,0000,,so that we eventually can\Nget these gametes that can
Dialogue: 0,0:03:27.40,0:03:30.96,Default,,0000,0000,0000,,participate in sexual reproduction.
Dialogue: 0,0:03:30.96,0:03:32.30,Default,,0000,0000,0000,,This is an amazing thing,
Dialogue: 0,0:03:32.30,0:03:37.30,Default,,0000,0000,0000,,and it's developed over\Nbillions of years of evolution,
Dialogue: 0,0:03:38.32,0:03:41.16,Default,,0000,0000,0000,,but it's just mind boggling\Nto think about the complexity,
Dialogue: 0,0:03:41.16,0:03:42.50,Default,,0000,0000,0000,,and not all of this is\Ncompletely understood
Dialogue: 0,0:03:42.50,0:03:43.87,Default,,0000,0000,0000,,exactly how all of this works.
Dialogue: 0,0:03:43.87,0:03:45.84,Default,,0000,0000,0000,,I mean you have these\Nkind of motor proteins
Dialogue: 0,0:03:45.84,0:03:50.84,Default,,0000,0000,0000,,that help move the chromosomes\Nalong, these microtubules
Dialogue: 0,0:03:51.20,0:03:53.75,Default,,0000,0000,0000,,can elongate and shorten\Nin interesting ways.
Dialogue: 0,0:03:53.75,0:03:55.76,Default,,0000,0000,0000,,So it's a really fascinating process.
Dialogue: 0,0:03:55.76,0:03:58.73,Default,,0000,0000,0000,,But anyway, this is what's\Nhappening in metaphase I.
Dialogue: 0,0:03:58.73,0:04:01.25,Default,,0000,0000,0000,,Now you can probably guess\Nwhat happens after that.
Dialogue: 0,0:04:01.25,0:04:03.63,Default,,0000,0000,0000,,We then move to anaphase I.
Dialogue: 0,0:04:03.63,0:04:06.58,Default,,0000,0000,0000,,So let me, we now go to anaphase I.
Dialogue: 0,0:04:06.58,0:04:08.00,Default,,0000,0000,0000,,I'll write that over here.
Dialogue: 0,0:04:08.11,0:04:11.53,Default,,0000,0000,0000,,Anaphase, anaphase I,
Dialogue: 0,0:04:12.01,0:04:14.88,Default,,0000,0000,0000,,and just like anaphase in mitosis,
Dialogue: 0,0:04:14.88,0:04:19.07,Default,,0000,0000,0000,,over here, the chromosomes\Nstart getting pulled apart,
Dialogue: 0,0:04:19.07,0:04:21.89,Default,,0000,0000,0000,,except for one significant difference,
Dialogue: 0,0:04:21.89,0:04:24.35,Default,,0000,0000,0000,,and this is actually a very\Nsignificant difference.
Dialogue: 0,0:04:24.38,0:04:29.38,Default,,0000,0000,0000,,In mitosis, the sister\Nchromatids get pulled apart.
Dialogue: 0,0:04:30.16,0:04:32.12,Default,,0000,0000,0000,,The sister chromatids get pulled apart
Dialogue: 0,0:04:32.12,0:04:34.78,Default,,0000,0000,0000,,to become two daughter chromosomes.
Dialogue: 0,0:04:34.78,0:04:37.55,Default,,0000,0000,0000,,That does not happen in anaphase I.
Dialogue: 0,0:04:37.55,0:04:41.85,Default,,0000,0000,0000,,In anaphase I, the sister\Nchromatids stay together.
Dialogue: 0,0:04:41.85,0:04:45.94,Default,,0000,0000,0000,,It's the homologous pairs\Nthat get pulled apart.
Dialogue: 0,0:04:45.97,0:04:47.37,Default,,0000,0000,0000,,So let me draw that.
Dialogue: 0,0:04:47.55,0:04:49.95,Default,,0000,0000,0000,,So this homologous pair\Nup here gets pulled apart.
Dialogue: 0,0:04:49.95,0:04:52.96,Default,,0000,0000,0000,,The two sister chromatids do\Nnot get pulled apart here.
Dialogue: 0,0:04:52.96,0:04:56.90,Default,,0000,0000,0000,,So you have this one is\Ngetting pulled onto this side.
Dialogue: 0,0:04:57.53,0:05:00.02,Default,,0000,0000,0000,,So this one's getting\Npulled onto this side.
Dialogue: 0,0:05:00.02,0:05:03.40,Default,,0000,0000,0000,,It has a little bit from the original,
Dialogue: 0,0:05:03.40,0:05:06.04,Default,,0000,0000,0000,,so a little bit of that right over there.
Dialogue: 0,0:05:06.08,0:05:09.10,Default,,0000,0000,0000,,And then you have this one\Ngetting pulled on this side.
Dialogue: 0,0:05:09.55,0:05:14.52,Default,,0000,0000,0000,,So draw it the best I can, the colors,
Dialogue: 0,0:05:14.52,0:05:15.52,Default,,0000,0000,0000,,alright, so it looks like that,
Dialogue: 0,0:05:15.52,0:05:17.63,Default,,0000,0000,0000,,although it's nice to have,\Nit's kinda easy to keep track of
Dialogue: 0,0:05:17.63,0:05:19.79,Default,,0000,0000,0000,,cause these switch colors like that.
Dialogue: 0,0:05:19.79,0:05:22.82,Default,,0000,0000,0000,,And then you have this one\Ngetting pulled on this side.
Dialogue: 0,0:05:23.38,0:05:25.04,Default,,0000,0000,0000,,This one getting pulled on this side.
Dialogue: 0,0:05:25.04,0:05:30.04,Default,,0000,0000,0000,,And finally finally this one\Ngetting pulled onto that side.
Dialogue: 0,0:05:32.37,0:05:34.73,Default,,0000,0000,0000,,And let me draw the centrosomes.
Dialogue: 0,0:05:34.73,0:05:37.41,Default,,0000,0000,0000,,So that's my, oops, centrosome,
Dialogue: 0,0:05:37.41,0:05:39.29,Default,,0000,0000,0000,,and once again, it's pulling,
Dialogue: 0,0:05:39.29,0:05:41.84,Default,,0000,0000,0000,,or I guess you could say the\Nchromosomes are being moved
Dialogue: 0,0:05:41.84,0:05:43.67,Default,,0000,0000,0000,,and these things are\Npushing each other apart.
Dialogue: 0,0:05:43.67,0:05:45.07,Default,,0000,0000,0000,,The two centrosomes might be pushing apart
Dialogue: 0,0:05:45.07,0:05:48.67,Default,,0000,0000,0000,,to get to the opposite\Nends of the actual cell,
Dialogue: 0,0:05:48.67,0:05:50.61,Default,,0000,0000,0000,,but they're bringing,
Dialogue: 0,0:05:50.61,0:05:52.16,Default,,0000,0000,0000,,there's all sorts of\Ninteresting mechanisms
Dialogue: 0,0:05:52.16,0:05:54.31,Default,,0000,0000,0000,,that are bringing along\Nthese microtubules,
Dialogue: 0,0:05:54.31,0:05:56.53,Default,,0000,0000,0000,,bringing the chromosomes,
Dialogue: 0,0:05:56.53,0:05:58.79,Default,,0000,0000,0000,,once again splitting the homologous pairs.
Dialogue: 0,0:05:58.79,0:06:00.73,Default,,0000,0000,0000,,And how they split is random.
Dialogue: 0,0:06:00.73,0:06:02.93,Default,,0000,0000,0000,,You know, this pink one could\Nhave been on the right side,
Dialogue: 0,0:06:02.93,0:06:04.09,Default,,0000,0000,0000,,this orange one could have\Nbeen on the left side,
Dialogue: 0,0:06:04.09,0:06:05.39,Default,,0000,0000,0000,,or vice versa, and once again,
Dialogue: 0,0:06:05.39,0:06:10.39,Default,,0000,0000,0000,,this adds more variation\Namongst the gametes,
Dialogue: 0,0:06:12.36,0:06:15.68,Default,,0000,0000,0000,,so even all of the resulting\Ngametes that get produced,
Dialogue: 0,0:06:15.68,0:06:19.42,Default,,0000,0000,0000,,they all will have different\Ngenetic information.
Dialogue: 0,0:06:19.42,0:06:20.93,Default,,0000,0000,0000,,So this is anaphase I.
Dialogue: 0,0:06:20.93,0:06:22.21,Default,,0000,0000,0000,,You're pulling these apart, and
Dialogue: 0,0:06:22.21,0:06:25.32,Default,,0000,0000,0000,,then you could imagine what\Nhappens in telophase I.
Dialogue: 0,0:06:25.33,0:06:30.33,Default,,0000,0000,0000,,So telophase I, telophase, telophase I.
Dialogue: 0,0:06:32.56,0:06:36.55,Default,,0000,0000,0000,,Telophase I, and this is fairly analogous
Dialogue: 0,0:06:36.55,0:06:39.50,Default,,0000,0000,0000,,to what happens in mitosis in telophase.
Dialogue: 0,0:06:39.50,0:06:44.22,Default,,0000,0000,0000,,So now you have your\Ncytokinesis is beginning,
Dialogue: 0,0:06:44.41,0:06:47.00,Default,,0000,0000,0000,,and actually, it might even begin earlier,
Dialogue: 0,0:06:47.00,0:06:49.81,Default,,0000,0000,0000,,in mitosis it happens\Nas early as anaphase,
Dialogue: 0,0:06:49.81,0:06:51.54,Default,,0000,0000,0000,,at least the cytokinesis is starting,
Dialogue: 0,0:06:51.54,0:06:53.12,Default,,0000,0000,0000,,but you're starting to see that.
Dialogue: 0,0:06:53.12,0:06:58.12,Default,,0000,0000,0000,,The homologous pairs\Nare fully split apart,
Dialogue: 0,0:06:58.38,0:06:59.79,Default,,0000,0000,0000,,and they're at opposite ends,
Dialogue: 0,0:06:59.79,0:07:03.45,Default,,0000,0000,0000,,and actually they can begin to unravel
Dialogue: 0,0:07:03.45,0:07:04.86,Default,,0000,0000,0000,,into their chromatin state,
Dialogue: 0,0:07:04.86,0:07:09.86,Default,,0000,0000,0000,,so this one began to unravel\Ninto its chromatin state.
Dialogue: 0,0:07:10.36,0:07:12.33,Default,,0000,0000,0000,,It has a little bit of the magenta.
Dialogue: 0,0:07:12.39,0:07:16.88,Default,,0000,0000,0000,,Oops, it has a little bit of\Nthe magenta right over here.
Dialogue: 0,0:07:17.28,0:07:19.53,Default,,0000,0000,0000,,This is unravelling as well.
Dialogue: 0,0:07:19.53,0:07:22.18,Default,,0000,0000,0000,,This is unravelling like that,
Dialogue: 0,0:07:22.18,0:07:24.13,Default,,0000,0000,0000,,once it gets into its chromatin state.
Dialogue: 0,0:07:24.13,0:07:28.38,Default,,0000,0000,0000,,The cellular, and let me\Ndo the other ones as well.
Dialogue: 0,0:07:28.38,0:07:32.21,Default,,0000,0000,0000,,So this is this one right over here.
Dialogue: 0,0:07:32.21,0:07:34.69,Default,,0000,0000,0000,,It's beginning to unravel.
Dialogue: 0,0:07:35.25,0:07:39.11,Default,,0000,0000,0000,,This one over here, beginning to unravel.
Dialogue: 0,0:07:39.11,0:07:41.38,Default,,0000,0000,0000,,It's got a bit of orange on it.
Dialogue: 0,0:07:41.67,0:07:42.97,Default,,0000,0000,0000,,It's got a little bit of orange on it.
Dialogue: 0,0:07:42.97,0:07:45.85,Default,,0000,0000,0000,,The nuclear membrane begins to form again.
Dialogue: 0,0:07:45.85,0:07:50.82,Default,,0000,0000,0000,,The nuclear membrane begins to form again.
Dialogue: 0,0:07:51.79,0:07:54.37,Default,,0000,0000,0000,,In some ways, it's reversing\Nwhat happened in prophase I
Dialogue: 0,0:07:54.37,0:07:55.75,Default,,0000,0000,0000,,where the nuclear membrane disappeared,
Dialogue: 0,0:07:55.75,0:07:58.16,Default,,0000,0000,0000,,and the chromosomes condensed.
Dialogue: 0,0:07:58.52,0:08:03.52,Default,,0000,0000,0000,,And let me draw, let me\Ndraw the centrosomes,
Dialogue: 0,0:08:03.63,0:08:06.73,Default,,0000,0000,0000,,which are outside the nuclear\Nmembrane, just like that.
Dialogue: 0,0:08:06.73,0:08:09.66,Default,,0000,0000,0000,,And the microtubules are also dissolving.
Dialogue: 0,0:08:09.87,0:08:11.75,Default,,0000,0000,0000,,The microtubules are also dissolving.
Dialogue: 0,0:08:11.75,0:08:14.59,Default,,0000,0000,0000,,And you have your cytokinesis.
Dialogue: 0,0:08:14.59,0:08:17.01,Default,,0000,0000,0000,,So your cytokinesis, so these separate.
Dialogue: 0,0:08:17.01,0:08:20.38,Default,,0000,0000,0000,,These separate into two cells.
Dialogue: 0,0:08:20.51,0:08:22.31,Default,,0000,0000,0000,,So once again, when we did the overview
Dialogue: 0,0:08:22.31,0:08:26.41,Default,,0000,0000,0000,,of meiosis, we said look,\Nthe first phase of meisosis,
Dialogue: 0,0:08:26.41,0:08:31.41,Default,,0000,0000,0000,,you go from a diploid germ\Ncell to two haploid cells.
Dialogue: 0,0:08:32.25,0:08:35.28,Default,,0000,0000,0000,,And these aren't quite\Nour end product yet.
Dialogue: 0,0:08:35.28,0:08:37.55,Default,,0000,0000,0000,,This right over here, what\Nwe have just gone through,
Dialogue: 0,0:08:37.55,0:08:39.32,Default,,0000,0000,0000,,what we have just gone through,
Dialogue: 0,0:08:39.32,0:08:42.61,Default,,0000,0000,0000,,all of this combined that\Nwe have just gone through,
Dialogue: 0,0:08:42.61,0:08:44.27,Default,,0000,0000,0000,,this is meiosis I.
Dialogue: 0,0:08:44.27,0:08:48.48,Default,,0000,0000,0000,,And in the next video, we're\Ngonna go through meiosis II.
Dialogue: 0,0:08:48.48,0:08:50.78,Default,,0000,0000,0000,,Whoops, I didn't mean to do that.
Dialogue: 0,0:08:51.14,0:08:56.14,Default,,0000,0000,0000,,This is, so let's see,\Nall of this is meiosis I.
Dialogue: 0,0:08:56.62,0:08:59.61,Default,,0000,0000,0000,,Let me write that in a\Ndifferent color, in bold.
Dialogue: 0,0:09:00.10,0:09:04.71,Default,,0000,0000,0000,,So this is all meiosis, meiosis I here,
Dialogue: 0,0:09:04.71,0:09:07.24,Default,,0000,0000,0000,,and you can see each of these cells now
Dialogue: 0,0:09:07.24,0:09:08.74,Default,,0000,0000,0000,,have a haploid number.
Dialogue: 0,0:09:08.74,0:09:13.19,Default,,0000,0000,0000,,They now have a haploid, haploid number
Dialogue: 0,0:09:13.19,0:09:15.18,Default,,0000,0000,0000,,of two chromosomes each.
Dialogue: 0,0:09:15.18,0:09:16.46,Default,,0000,0000,0000,,Now each of those two chromosomes
Dialogue: 0,0:09:16.46,0:09:20.42,Default,,0000,0000,0000,,do have two sister chromatids,
Dialogue: 0,0:09:20.42,0:09:22.54,Default,,0000,0000,0000,,and as we'll see in meiosis II,
Dialogue: 0,0:09:22.54,0:09:24.60,Default,,0000,0000,0000,,which is very similar to mitosis,
Dialogue: 0,0:09:24.60,0:09:27.42,Default,,0000,0000,0000,,is going to split up the sister chromatids
Dialogue: 0,0:09:27.42,0:09:28.66,Default,,0000,0000,0000,,from each of these chromosomes,
Dialogue: 0,0:09:28.66,0:09:32.12,Default,,0000,0000,0000,,which gives us two daughter chromosomes.
Dialogue: 0,0:09:32.12,0:09:33.58,Default,,0000,0000,0000,,So we're gonna see that over here.
Dialogue: 0,0:09:33.58,0:09:35.28,Default,,0000,0000,0000,,So your haploid number here is two.
Dialogue: 0,0:09:35.28,0:09:37.01,Default,,0000,0000,0000,,You have two chromosomes here and
Dialogue: 0,0:09:37.01,0:09:38.52,Default,,0000,0000,0000,,you have two chromosomes there.
Dialogue: 0,0:09:38.52,0:09:42.02,Default,,0000,0000,0000,,And we'll explore meiosis\NII in the next video.