BIOA02H3 Lecture Notes - Lecture 8: Hox Gene, Saprotrophic Nutrition, Chromosome
16 Aug 2016
School
Department
Course
Professor
43
BIOA02H3 Full Course Notes
Verified Note
43 documents
Document Summary
Vertebrates probably arose from a cephalochordate-like ancestor through the duplication of genes that regulate development. Early vertebrates diversified into numerous lineages with distinctive adaptations. Homeotic genes: families of genes that determine the structure of body parts during embryonic development. Hox genes influence the 3-d shape of the animal and location of structures like the eyes, wings, legs etc. *hox genes are arranged along the chromosome in a particular order forming the hox gene complex. Fungi (along w/ heterotrophic bacteria) are the earth"s premier decomposers. They are used in foods like cheeses. Budding yeast cells of some fungi are used in baking, brewing and winemaking. Fungi have been around for at least 760 million years; the first fungi were most likely aquatic; they have several major lineages. Symbiotic relationships parasitism: one organism benefits at the expense of the other. mutualism: both organisms benefit. Absorptive nutrition: fungi secrete enzymes into their environment, breaking.
