Genetics and inheritance
In this lesson, we look at the structure of the genome and the chromosomes of organisms and we also take a look at the different laws of Mendel and how these laws explain how characteristics are inherited from the parents to and offspring.
Genetic diagrams and monohybrid crosses
We discuss the structure of genetic diagrams and use the diagrams to show inheritance in monohybrid crosses to determine the percentage chance of an offspring inheriting a specific characteristic from their parents.
We investigate crosses between individuals when there is incomplete dominance between the different characteristics and what the phenotypes will look like in such cases. We do the same with co-dominant traits.
Genetic crosses: Inheritance of sex and multiple alleles
We take a look at how the sex of an individual is determined and we also investigate genetic crosses where multiple alleles exist for example blood types in humans
Dihybrid crosses and pedigree diagrams
We discuss dihybrid crosses where two independent alleles are investigated to determine the chances of two different characteristics occurring in the same individual. We also look at pedigree diagrams and how inheritance can be determined by using these diagrams.
Genetic mutation and biotechnology
We discuss the significance of genetic mutations and the ways in which mutations can take place. We also discuss the use of biotechnology to the benefit of humans.
Human nervous system: The Central nervous system
We discuss the central nervous system in humans and the different parts that make up the central nervous system as well as the function of the different parts.
Human nervous system:The peripheral nervous system and the reflex arc
We take a closer look at the peripheral nervous system and the functions thereof and we discuss reflex reactions with specific reference to the reflex arc.
We take a look at the different structures that occur in the eye and we take a closer look at the function of the eye and how the amount of light that enters the eye is controlled as well as the control of the lens in the eye to ensure that clearly focussed images are formed.