11.6

• Biologie
• Middelbare school
• vwo
• Leerjaar 3

What do you remeber of last class?

What are...

Genotype and phenotype?

Alleles and genes?

11.6 Cells and chromosomes

Learning objective

You will learn about cell division and cell differentiation.

How do sex cells get 23 chromosomes?

Meiosis or reduction division = a special kind of cell division in which sex cells containing half the original number of chromosomes develop.

Haploid = when a cell only contains one copy of each pair of chromosomes

Meiosis 

Simple cell division

Mitosis = simple cell division; two cells with the complete number of chromosomes are formed from one single cell

Diploid = when a body cell has two sets of chromosomes

Mitosis

Cell differentiation

Cell differentiation = different types of cells differ in shape and size

Cell specialisation = different types of cells differ in function

Regulatory genes = control what proteins are produced to turn genes in a cell on or off

Regulatory genes = control what proteins are produced to turn genes in a cell on or off

What?	Read: 11.6 Make: 11.6 assignments 1-9
How?	In your book. Independently. You may whisper.
Help?	Raise your hand. If he/she is not listening to music, you may ask your neighbour first.
Time?	10-15 minutes
Finished?	Check your answers. Then make 10 + 11
Proceeds	You have finished your homework! Well done!