Cell division Flashcards
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What plant tissue would you see mitosis undergoing (1)
- root tip
- shoot tip
- meristem
What stage of the cell cycle will be in greater numbers than in other cells (2)
- interphase
- the longest phase
How would cells produced by meiosis differ from those produced by mitosis (2)
- all cells would be haploid
- all cells would be gentically different
State the purpose of meiosis (1)
- produces gamete
- produce haploid cells
Name the organs in animals where meiosis occurs (1)
- testes
- ovaries
Describe the changes that occur to a plant cell during prophase (4)
- nuclear membrane disappear
- chromosomes condense
- appear as two sister chromatids
- chromatids joined at centromere
- spindle form
Explain the importance of thi type of cell division in the animal (2)
- meiosis produces hapoid gametes allow diploid state to be restored
- meiosi produces gentically different gametes
Explain why nuclei are only visible in some cells and appear to be different sizes
- angle of section through cell may not include a nucleus
- where nucleus is visible may have been cut at different planes
Describe the differences between mitosis or meiosis except the number of cells produced (2)
- produces genetically different cells mitosis produced genetically identical cells
- meiosis cells are haploid and mitosis are diploid
Describe and explain what happens to chromosomes during anaphase of mitosis (3)
- centromere split
- chromatids pulled to opposite poles
- contraction of spingle fibres
Name the cell organell reponible for the production of spindle fibres (1)
centrioles
State two evens that occur during interphase (2)
- ATP production
- replication of DNA
- replication of organelles
- protein synthesi
- cell increase in size
Explain how mitosi maintain genetic stability (2)
- two genetically identical daughter cells are produced
- genetically identical of parent cell
