BIO 1130 Lecture Notes - Lecture 3: Allopatric Speciation, Binomial Nomenclature, Allele Frequency

• School: University of Ottawa
• Department: Biology
• Course: BIO 1130
• Professor: Jon Houseman

Document Summary

Particularly when change in environment makes new resources available, opens environmental niches. Member/ pair of genes occupying specific spot on chromosome that controls the same trait. Ex: one allele codes for blue eyes, other for brown. If recessive is more common than dominant than it will be expressed more often. Speciation in which biological populations are physically isolated by external barrier, evolve intrinsic reproductive isolation. If barrier breaks down, individuals can no longer interbreed. Hybrid individual/ cell having two or more sets of chromosomes from two different species. Derived trait given to one member of a clade, no others. More than two sets of chromosomes all derived from same species. Potential mates meet, but choose members of own species. Also organism belonging to such category, being represented in binomial nomenclature. Population that has undergone temporary restriction that has severely reduced genetic diversity.