BIOL 1001 Study Guide - Midterm Guide: Genetic Drift, Selective Breeding, Pleiotropy

• School: York University
• Department: Biology
• Course: BIOL 1001
• Professor: Tamara Kelly

Document Summary

Words to define: analogy: similarity of function of structures that have different origins. Ex: winds of fly, moth & birds are analogous because they developed independently as adaptations to a common function. Applies to convergent evolution, where organisms evolved analogous structures due to similar environmental pressures even though their ancestors are unrelated: parsimony: it"s the pri(cid:374)(cid:272)iple that the si(cid:373)plest e(cid:454)pla(cid:374)atio(cid:374) (cid:272)a(cid:374) e(cid:454)plai(cid:374) the data is to (cid:271)e preferred. Different alleles result in different observable phe(cid:374)ot(cid:455)pi(cid:272) traits. It"s a (cid:448)aria(cid:374)t of a gene: gene: is a basic physical & functional unit of heredity. Genes are made of dna, acts as instruction to make molecules called proteins. Region of dna that encodes a specific function: genetic variation: term use to describe the variation in dna sequence in each of our genomes. Loci/locus: it"s the positio(cid:374) o(cid:374) a (cid:272)hro(cid:373)oso(cid:373)e. ea(cid:272)h (cid:272)hro(cid:373)oso(cid:373)e (cid:272)arries (cid:373)a(cid:374)(cid:455) ge(cid:374)es. Genetic differences b/t taxa are said to been fixed in each species: mutations (deleterious.