Unit 5.2 Chromosomes

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

Unit 5 

Heredity and evolution

Basic 2

Chromosomes

Today's planning

Unit 5 (Book 2/3 B), Basic 2 Chromosomes 

Learning objectives: 

You can explain how each of the parents provides 50% of the chromosomes.

You can say how the sex of a human is determined by sex chromosomes.

You can explain how sexual reproduction causes variation in genotypes.

Fill in the gaps

Human cells have ...(1)... chromosomes. Those chromosomes occur in ... (2)... , so you have ...(3)...  pairs of chromosomes in a cell nucleus. The 23rd chromosome pair are the ...(4)... . Women have ...(5)... and men have ...(6)... . 

Which cells undergo meiosis and why?

Body Cell (46)                    Sex cell (23)

LET'S PRACTICE

BS5.1: 2-4, 6, 7 (choose between 8 and 9)

BS5.2: Make exercise 1to 4, 7a, extra: 10 and 11.