CELLS Cells Human body 100 trillion cells in

CELLS

Cells � Human body: 100 trillion cells (in German: 100 Billionen) � � � Size: 0, 004 mm (~4 -5 µm) Put in line: 100 times around earth Every second: 50 million cell die

Cells � Every cell has its own task (hair, liver, heart, muscle, eye. . . ) � Life of a cell: � lip: 2 weeks � liver: 8 month � Biggest human cell: female egg cell (0, 12 mm)

Structure of animal cell https: //www. youtube. com/watch? v=2 s 87 Sy. Rh 3 t 0

Clawed frog (Krallenfrosch)

Experiment (by J. Gurdon, 1961)

What can you say regarding the findings of J. Gurdon? Share with class.

Genetic information � � Genetic information (DNA) is located in the nucleus of a cell Every cell contains the whole genetic information of a person!!

Genetic information � � Human 46 chromosomes (the aquatic rat has 92, a dog 78) 23 pairs of homologue chromosomes 22 pairs of autosomes, 1 pair of sex chromosomes Female: 46, xx, male: 46, xy

Karyogram � � DNA, in form of chromosomes http: //www. youtube. com/watch? v=zsaf. Z 17 p. KC 4

WALT know what cell cycle is Homework : Explain what is apoptosis?

Mitosis - Growth?

DNA extraction

DNA extraction from saliva Materials & Set Up � 1/4 of a test tube full of your saliva � several drops of dish soap � a pinch of table salt (1/16 of a teaspoon) � some washing powder � ice-cold liquor