Mitosis
Muhtasari
You began as one cell, and now you are made of trillions, all carrying the same genetic information. The process that copies a cell exactly, again and again, is mitosis. It is how you grow, how wounds heal, how worn-out cells are replaced, and how many organisms reproduce without a partner.
In this Extended lesson you will describe mitosis as nuclear division giving identical cells, state its roles in growth, repair, replacement and asexual reproduction, explain why chromosomes are copied first, and meet stem cells, the unspecialised cells that divide to produce all the specialised cells of the body.
Malengo
- [Supplement] Describe mitosis as nuclear division giving rise to genetically identical cells (details of the stages of mitosis are not required)
- [Supplement] State the role of mitosis in growth, repair of damaged tissues, replacement of cells and asexual reproduction
- [Supplement] State that the exact replication of chromosomes occurs before mitosis
- [Supplement] State that during mitosis, the copies of chromosomes separate, maintaining the chromosome number in each daughter cell
- [Supplement] Describe stem cells as unspecialised cells that divide by mitosis to produce daughter cells that can become specialised for specific functions
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Maelezo ya Somo
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Pata programu ya Green Bridge CBT kwenye simu au kompyuta yako kwa maktaba kamili ya IGCSE: mitihani ya miaka iliyopita, miongozo ya usahihishaji, ramani za mawazo, kadi za marudio na masomo ya sauti.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Mitosis. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- Mitosis produces daughter cells that are: A. genetically identical to the parent cell B. haploid C. genetically different from each other D. gametes Answer: A
- Which is NOT a role of mitosis? A. growth B. repair of tissues C. production of gametes D. asexual reproduction Answer: C
- What happens to the chromosomes just before mitosis begins? A. they are halved B. they are exactly replicated C. they break down D. they pair up and swap genes Answer: B
- A cell with 46 chromosomes divides by mitosis. Each daughter cell has: A. 23 chromosomes B. 46 chromosomes C. 92 chromosomes D. a random number Answer: B
- Stem cells are best described as: A. specialised cells that cannot divide B. unspecialised cells that divide by mitosis and can specialise C. gametes D. dead cells Answer: B
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Vitabu Vinavyopendekezwa
Jifunze zaidi kutoka vyanzo huria
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Sehemu ya kitabu
The Cell Cycle
Describe the three stages of interphase
"Biology: The Cell Cycle" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/10-2-the-cell-cycle. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Mitosis? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
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