Subjects: Biology

Illustrates the phases of meiosis and explores its importance in maintaining the proper number of chromosomes during gamete formation. Explains how crossing over and nondisjunction increase diversity in the species.

Compares the processes of mitosis and meiosis, focusing on the tissues in which these processes occur, the behaviour and number of chromosomes involved and the types of cells produced. Shows actual cells undergoing mitosis and meiosis.

Uses the analogy of soccer to explore diversity in plant and animal reproductive strategies. Compares sexual and asexual reproduction, looking at chromosomal activity, genetic variation and consequences of budding, binary fission and spore production.

Outlines the principles which form the basis of classical genetics. Demonstrates the experiments that Gregor Mendel conducted on pea plants and reveals the laws of inheritance. Probability and Punnett squares predict the results of monohybrid crosses.

Uses the analogy of square dancing to introduce dihybrid crosses. Illustrates how the laws of inheritance for monohybrid crosses also apply to dihybrid crosses. Demonstrates how probability and the product rule determine the outcome of trait crosses.

Reveals how knowledge of Mendelian genetics, blood groups, and pedigrees can be used to solve a paternity case. Examines other patterns of human inheritance involving skin colour, eye colour and height.

Looks at exceptions to segregation and independent assortment during gamete formation. Examines the effect of gene linkage on phenotypic and genotypic ratios. Uses cross-over values in Sordaria to determine the distance of a gene from the centromere.

Examines the findings of Thomas Morgan regarding sex-linked inheritance. Investigates the probabilities of males and females inheriting sex-linked traits such as colour blindness and hemophilia. Uses graphics to analyse sex-linked traits.

Provides references to relevant pages in print resources and additional information on concepts presented in the video programs.

Examines the reproductive technologies that have augmented and altered the chemical control system involved in human reproduction. Reveals how sexually transmitted diseases affect and damage the reproductive system.