BIOL 039 Lecture Notes - Lecture 7: Gibberellin, Basic Helix-Loop-Helix, Amylose
Document Summary
Gene r: seed shape - round or wrinkle. Produces an enzume that converts a linear starch molecules (amylose) into a complex, branched form (amylopectin) Amylose attracts water and lead to wrinkled appearance. Gene le: stem length tall or short. Produces giberellin-3-[beta]-hydroxylase, an enzyme involved in production of the plant growth hormone, gibberellin. Wild-plants can produce gibberellin and grow tall. Gene sgr: seed color green or yellow. Produce enzyme involved in the breakdown of chlorophyll so that initially green seeds lose chlorophyll and turn yellow as they mature. Gene bhlh: flower color (purple or white) Produce a transcription factor that activates expression of certain genes. Activate a pathway that produces the purple pigment anthocyanin. Most recessive mutant alleles are loss-of-function mutations. Loss-of-fuction must be homozygous in order for phenotype to be observed. Help tracing the inheritance of traits in humans and some animals. The generations are indicated by roman numerals (i, ii, iii); individuals by.
