쉐도잉 연습: Mitosis vs. Meiosis: Side by Side Comparison - 영상으로 영어 말하기 배우기
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In biology, there are often vocabulary terms that sound pretty similar.
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Chromosome.
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Chromatid. Chromatin.
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Transcription.
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Translation.
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Mitosis. Meiosis.
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You probably have encountered this.
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When I was first learning about mitosis and meiosis, I learned them both separately first.
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And then I tried to figure out what was the same about them, what was different, why did they both matter?
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I would try to compare the stages by flipping through images.
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You know what would have helped me?
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A side by side comparison.
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And that’s what this video is.
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We assume you already have a background of mitosis and meiosis---if not take a look at our videos on them---but this video is a side by side comparison.
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Presented in a split screen.
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Mitosis on the left.
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Meiosis on the right.
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Both of these processes, along with the cytokinesis that follows them to split the cytoplasm, are involved in making new cells.
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Mitosis results in body cells.
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Meiosis results in sperm and egg cells, otherwise knows as the fancy term, gametes.
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Before we start mitosis and meiosis, let’s look at what you start with.
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Your starting cell in both mitosis and meiosis is diploid, written here as 2n.
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That means it has 2 sets of chromosomes---in humans, that’s including one set of 23 chromosomes from mom and one set of 23 chromosomes from dad.
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46 chromosomes total in humans.
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During interphase, the cell duplicates the chromosomes.
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When you duplicate 46 chromosomes, you still say there are 46 chromosomes as the newly duplicated portion is still attached at the centromere region---but there are actually 92 chromatids.
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Interphase isn’t part of mitosis or meiosis, but it’s a really important phase because it duplicates chromosomes before we get started.
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Just to point out, it’s really hard to draw 46 chromosomes which is how many humans have.
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We’re going to use 6 chromosomes in our diagrams when we illustrate what’s happening because it’s much easier to draw and visualize.
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Oh and just a fun fact: some insects have 6 chromosomes.
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Like mosquitoes.
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Unfortunately, I am not a fan of mosquitoes.
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But mosquitoes do mitosis and meiosis too.
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When learning the stages, we give the acronym PMAT which is helpful for understanding the stages.
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Both mitosis and meiosis go through these stages, but meiosis goes through them twice and therefore has a number next to each PMAT stage.
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We’re going to show some basic events for each PMAT stage, but please know there is way more detail to explore than what we can include in this quick video.
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Prophase in mitosis.
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Remember that “pro” can mean “before” and this stage comes before the others.
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The chromosomes are visible; in fact, we say they’re condensing which means they are thickening.
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Prophase I in meiosis.
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Happening here too, but the chromosomes are actually going to match up with their homologous pairs.
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The word homologous means that the chromosomes are approximately the same size and that they contain the same types of genes in the same locations.
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With each pair, one came from mom and one came from dad.
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In this formation, chromosomes can transfer their genetic information and exchange it between each other.
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It’s called crossing over!
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It can make for what we call recombinant chromosomes.
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Metaphase in mitosis.
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The nuclear envelope which had surrounded the nucleus was already disassembled before metaphase started.
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For metaphase, I like to remember the M for middle because in this stage the chromosomes line up in the middle of the cell in a single file line.
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Metaphase I in meiosis.
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The chromosomes are in the middle as well, but they’re still going to be in pairs in the middle of the cell so it’s not a single file line.
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Anaphase in mitosis.
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I like to think as the A is for “away.” The chromatids are pulled away by the work of the spindles.
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They are moving to the opposite sides of the cell.
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Anaphase I in meiosis.
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Same thing but in this case, it’s the chromosomes- not chromatids- being pulled away to opposite sides of the cell.
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Telophase in mitosis and telophase I in meiosis.
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The chromosomes are at the complete opposite ends and new nuclei are forming on each side to make these two new cells.
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And they are starting to surround the chromosomes on both sides as this will eventually form 2 cells.
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Cytokinesis follows to split the cytoplasm to complete the actual dividing of the cell.
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So at the end of mitosis and cytokinesis, we end with two identical, diploid cells.
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In humans, they would both have 46 chromosomes.
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This is great for organism growth---growing requires making more cells after all---or replacing damaged cells.
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On to meiosis II!
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Prophase II.
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Chromosomes condensing in both cells.
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It’s not going to be as eventful as it was in prophase I because they are not going to have homologous pairs and crossing over.
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Metaphase II.
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M for middle, but this time, the chromosomes are in a single file line.
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Similar to how metaphase looked in mitosis.
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Anaphase II.
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Think A for away.
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This time, though, it’s actually the chromatids that are getting pulled away.
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Telophase II.
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Chromosomes are at the complete opposite ends and new nuclei are forming on each side to make new cells.
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Cytokinesis will follow meiosis II to completely split the cytoplasm.
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We are now finished with meiosis: and we end with four non-identical cells.
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Gametes. Males makes sperm cells in meiosis and females make egg cells in meiosis.
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These gametes are haploid, meaning they have half the number of chromosomes as the original starting cell.
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In the case of humans, the resulting cells would each have 23 chromosomes.
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By the way, when a sperm and egg cell combine, it results into a diploid cell, a fertilized egg otherwise known as a zygote, which will then start a series of divisions using mitosis to give rise to a brand new organism.
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Well, that’s it for the Amoeba Sisters, and we remind you to stay curious!
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이 레슨의 어휘와 말하기 포인트
이 말하기 레슨은 영상 “Mitosis vs. Meiosis: Side by Side Comparison”을(를) 바탕으로 합니다. 가장 자주 반복되는 단어는 다음과 같습니다: chromosome, cell, meiosis, mitosis, stage. 이 영상에는 섀도잉할 문장 82개와 단어 989개가 있습니다. 말하는 구간의 길이는 6:13입니다. 화자는 분당 약 159단어로, 일상 대화에 가까운 자연스러운 속도로 말합니다. 영어에서 가장 많이 쓰이는 3,000단어에 속하는 단어가 77%뿐이라 어휘가 어려운 편입니다.
이 영상의 핵심 어휘
영상에 나오는 익혀 둘 만한 단어 15개를 발음, 뜻과 함께 정리했습니다.
| 단어 | 발음 | 뜻 |
|---|---|---|
| duplicate 동사 | /ˈd(j)uː.plɪˌkeɪt/ | 복사하다 |
| mosquito 명사 | /məsˈki.toʊ/ | 모기 |
| nucleus 명사 | /ˈnuː.kli.əs/ | 핵심, 핵 |
| identical 형용사 | /ɪˈdɛntɪkl̩/ | 동일한, 똑같은 |
| organism 명사 | /ˈɔɹ.ɡəˌnɪz.əm/ | 생물, 유기체 |
| compare 동사 | /kəmˈpɛɚ/ | 비교하다, 비유하다 |
| curious 형용사 | /ˈkjʊɹ.i.əs/ | 호기심이 많은, 궁금하다 |
| translation 명사 | /tɹænzˈleɪʃən/ | 번역, 옮김 |
| visible 형용사 | /ˈvɪzɪb(ə)l/ | 보이는 |
| remind 동사 | /ɹəˈmaɪnd/ | 생각나게 하다, 상기(想起)시키다 |
| gene 명사 | /d͡ʒiːn/ | 유전자 |
| explore 동사 | /ɪkˈsploɹ/ | 탐험하다 |
| encounter 동사 | /ɪnˈkaʊntɚ/ | 만나다, 부닥치다 |
| biology 명사 | /baɪˈɑ.lə.d͡ʒi/ | 생물학 |
| combine 동사 | /kəmˈbaɪn/ | 조합하다, 결합하다 |
영상에 나오는 구동사
| 단어 | 뜻 |
|---|---|
| point out 동사 | 가리키다 |
이 영상의 문법
화자가 가장 많이 쓰는 문형을 영상 속 실제 표현과 함께 정리했습니다.
| 문형 | 영상 속 표현 |
|---|---|
| 수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점 | are involved · is still attached · was already disassembled |
| 관계절 who / which + 절 — 사람이나 사물에 대한 추가 정보 | chromosomes which is · PMAT which is · condensing which means |
주의할 발음
화자는 they're, we're, isn't 같은 축약형과 약화된 형태를 5번 사용합니다. 들리는 대로 짧게 발음하세요.
- “sh”와 “zh” 소리: translation /tɹænzˈleɪʃən/, transcription /tɹænˈskɹɪpʃən/, visualize /ˈvɪʒuəˌlaɪz/
- 긴 단어 — 강세 위치에 주의: organism /ˈɔɹ.ɡəˌnɪz.əm/, biology /baɪˈɑ.lə.d͡ʒi/, vocabulary /vəˈkæb.jə.lə.ɹi/, cytokinesis /ˌsaɪtoʊkɪˈniːsɪs/, cytoplasm /ˈsaɪtəʊˌplæzəm/
한국어 화자가 어려워하는 소리:
- /f/ — ㅍ(/p/)으로 바꾸지 말고 윗니를 아랫입술에 대기: helpful /ˈhɛlp.fl̩/, fancy /ˈfæn.si/, flip /flɪp/, anaphase /ˈænəˌfeɪz/, fertilize /ˈfɜː(ɹ)tɪlaɪz/
- /v/ — ㅂ(/b/)과 구별하기: visible /ˈvɪzɪb(ə)l/, divide /dɪˈvaɪd/, envelope /ˈɛnvə(ˌ)loʊp/, vocabulary /vəˈkæb.jə.lə.ɹi/, visualize /ˈvɪʒuəˌlaɪz/
- /z/ — ㅈ이 아니라 성대를 울리는 /s/: organism /ˈɔɹ.ɡəˌnɪz.əm/, translation /tɹænzˈleɪʃən/, visible /ˈvɪzɪb(ə)l/, anaphase /ˈænəˌfeɪz/, cytoplasm /ˈsaɪtəʊˌplæzəm/
이 영상으로 연습하는 방법
- 먼저 말하지 않고 영상을 끝까지 듣고 모르는 단어를 적어 둡니다.
- 0.75배속으로 한 문장씩 섀도잉을 시작하고, 익숙해지면 보통 속도로 돌아갑니다.
- 자신의 목소리를 녹음해 원본과 비교하고, duplicate, mosquito, nucleus 같은 단어에 특히 주의합니다.
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.