HSC 2100 Lecture Notes - Lecture 48: William Farrer, Heterosis, Zygosity
Document Summary
Section of dna that codes for a specific trait. "a discrete unit of hereditary information consisting of a specific nucleotide sequence in dna" Hybridisation is the cross-breeding of two genetically non-identical individuals. This may mean crossing parents of the same species, who show genetic variation (intraspecific) or it may extend to parents of different species (interspecific) In 1870, william farrer moved to australia from england. Australia was presenting problems - the strains being grown were not suited to the harsh, dry environment, were susceptible to disease and the grain quality was not of high enough standard for milling or baking. As a result of his farming efforts, farrer recognised desirable traits in different wheat varieties, so hybridised two favourable varieties to form the "federation" hybrid which was ideal for the australian climate. This advantageous mixture of adaptions is often known as "hybrid vigour". A haploid reproductive cell, such as an egg or sperm.
