Strengthening teaching and learning of cells

1
The mammalian circulatory system
Slide 3.12
2
Blood cells
Slide 3.14
3
Diagram of cross-section of a leaf
Slide 4.21
4
Sex cell division
Parent cell with 4 chromosomes. Chromosomes
replicate forming pairs of chromatids. Pairs of
chromosomes arrange themselves in the centre of
the cell. The chromosomes separate and move to
opposite ends of the cell. The first cell
division occurs. The chromosomes now separate
from each other and move to opposite ends of the
cells. The second cell division occurs.
Slide 4.29
5
Determining sex in humans

• Male parent provides sperm with either an X or Y
  chromosome. Female parent provides eggs with an X
  chromosome. The possible combinations in the
  offspring are

Slide 4.31