Daily Archives: May 20, 2009

Internal and External Fertilization

Horseshoe crabs spawning

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Amongst animals that reproduce sexually, there are those that use external fertilization (usually marine and aquatic organisms, such as corals, frogs, fish and the ancient horseshoe crabs shown above) and those that practise internal fertilization (mammals, birds, reptiles and some insects).

Six page handout including student worksheet on internal vs external fertilization.

Human Reproduction

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This Thursday we are looking at Chapter 7; Activity 7.3 in your practical manual – Human Reproduction. We will be labelling diagrams of the male and female reproductive systems and watching a short video.

Reproduction in other animals, including oviporous, viviporous and ovovivaporous animals.

The Reproductive systems of males and females, including labelled diagrams.

Role of hormones in human reproduction.

Excellent Stages of Meiosis Animation from McGraw Hill

Comparison of Mitosis and Meiosis from McGraw Hill

Random Orientation of Homologous Pairs of chromosomes during meiosis – McGraw Hill.

Meiosis – production of gametes – on Cells Alive!

Another Meiosis Animation from Sinauer Associates