YR3-TH3-LSN2

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

HAVE READY:

• your Book
• Your notebook
• laptop

KWIZL:

Check your knowledge by making YR3-TH3-LSN1 (7 minutes)

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Learning goals LSN 2:

● I know what chromosomes are, what they do and what they are made of.
● I know what genes are and I can explain what they do.
● I know what the different types of cell division are and what the main differences are.
● I understand the terms replication, translation & transcription and I can explain in detail in what order they happen and what the differences are.

Key words LSN 2:

• haploid
• diploid
• genetic variation
• nucleotides
• translation
• transcription
• meiosis
• mitosis

● m-RNA

• DNA

● genes

● chromosomes

DNA

Mitosis

Mitosis

• Cell grows in size
• DNA becomes duplicated (=replication)
• DNA divides in two parts. 
• Cell divides in two 

Karyotype

Image of all chromosomes in the nucleus of a cell (just before mitosis)

Diploid- 2 chromosomes of each.

Karyotype

Image of all chromosomes in the nucleus of a cell (just before mitosis)

Diploid- 2 chromosomes of each.

Other diploid organisms. 

Mitosis vs Meiosis

Diploid

Diploid

Diploid

Haploid

 Meiosis

Questions

In a potatoplant cells have 44 chromosomes and the plant can reproduce sexually. Answer the following questions about the potato cells.

a) How many chromosomes are visible at the beginning of mitosis?

b) How many are in each daughter cell after mitosis has taken place?

c) How many chromosomes are visible at the beginning of meiosis?

d) How many are in each daughter cell after meiosis has taken place?

e) What are the names given to the final products of meiosis?