Cell division

Question 1

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What plant tissue would you see mitosis undergoing (1)

Answer 1

• root tip
• shoot tip
• meristem

Question 2

What stage of the cell cycle will be in greater numbers than in other cells (2)

Answer 2

• interphase
• the longest phase

Question 3

How would cells produced by meiosis differ from those produced by mitosis (2)

Answer 3

• all cells would be haploid
• all cells would be gentically different

Question 4

State the purpose of meiosis (1)

Answer 4

• produces gamete
• produce haploid cells

Question 5

Name the organs in animals where meiosis occurs (1)

Answer 5

• testes
• ovaries

Question 6

Describe the changes that occur to a plant cell during prophase (4)

Answer 6

• nuclear membrane disappear
• chromosomes condense
• appear as two sister chromatids
• chromatids joined at centromere
• spindle form

Question 7

Explain the importance of thi type of cell division in the animal (2)

Answer 7

• meiosis produces hapoid gametes allow diploid state to be restored
• meiosi produces gentically different gametes

Question 8

Explain why nuclei are only visible in some cells and appear to be different sizes

Answer 8

• angle of section through cell may not include a nucleus
• where nucleus is visible may have been cut at different planes

Question 9

Describe the differences between mitosis or meiosis except the number of cells produced (2)

Answer 9

• produces genetically different cells mitosis produced genetically identical cells
• meiosis cells are haploid and mitosis are diploid

Question 10

Describe and explain what happens to chromosomes during anaphase of mitosis (3)

Answer 10

• centromere split
• chromatids pulled to opposite poles
• contraction of spingle fibres

Question 11

Name the cell organell reponible for the production of spindle fibres (1)

Answer 11

centrioles

Question 12

State two evens that occur during interphase (2)

Answer 12

• ATP production
• replication of DNA
• replication of organelles
• protein synthesi
• cell increase in size

Question 13

Explain how mitosi maintain genetic stability (2)

Answer 13

• two genetically identical daughter cells are produced
• genetically identical of parent cell