Mitosis vs Meiosis

• Biologie
• Middelbare school
• vwo
• Leerjaar 4

Mitosis vs Meiosis

Learning objectives

• Recognise whether a cell is undergoing mitosis or meiosis
• Analyse and predict chromosome numbers and DNA amounts 

The picture depicts what phase of meiosis

1. Prophase 1
2. Prophase 2
3. Anaphase 1
4. Anaphase 2

Meiosis is a type of cell division that produces:

1. zygotes
2. diploid cells
3. hair cells
4. gametes

Which of the following distinguishes prophase 1 of meiosis from prophase of mitosis?

1. homologous chromosomes pair up
2. spindle forms
3. nuclear membrane breaks down
4. chromosomes become visible

A cell with a diploid number of 24 undergoes meiosis, how many chromosomes are in each daughter cell?

1. 6
2. 12
3. 24
4. 48

2n= 4 for this species. Which phase does this show?

1. Mitosis - Telophase
2. Mitosis- Anaphase
3. Meiosis - Telophase 2
4. Meiosis - Anaphase 2

2n= 8 for this species. Which phase does this show?

1. Mitosis - Telophase
2. Mitosis- Anaphase
3. Meiosis - Telophase 2
4. Meiosis - Anaphase 2

Cancer

• Uncontrolled cell division
• Mutations in genes that control mitosis: increase mitosis or not limit mitosis 
• Result: more cells than necessary --> tumour
• Carcinogens: increase chance of these mutations

Types of tumours

• Benign: grows in a ball, stays together, does NOT spread
• Malignant: grows faster, spreads out, metastasis
  
  
• Metastasis: cell breaking off from
  primary tumour, travelling through body
  and forming secondary tumours

If a diploid organism has a genome consisting of 22 chromosomes, its gametes will have
_____ chromosomes.

1. 44
2. 11
3. 22
4. 88

At which stage of meiosis do chromatids separate and become daughter chromosomes?

1. Metaphase 1
2. Metaphase 2
3. Anaphase 1
4. Anaphase 2

Meiosis II is similar to mitosis in that...

1. homologous chromosomes group together
2. the daughter cells are diploid
3. sister chromatids separate during anaphase
4. the chromosome number is reduced

Which of these cells is undergoing Meiosis?

1. 1
2. 2

At which stages is the cell haploid?

1. VI
2. V, VI
3. IV, V, VI
4. all

Homework:

• Watch the video underneath
• Complete and hand in worksheet Recognising phases
• Study Quizlet
  
  
• Tip: pages book 108-111