HORT 2061 : Hort 2061 Test 1
Document Summary
Like smooth seed with wrinkled seed: traced the inheritance patterns of certain traits in pea plants and showed that they could be mathematically related (know phenotype. And genotype: mendels results were largely ignored. Gxe=phenotype: cell division, mitosis regular cell divisioin, cells produce exact copies, no change in chromosome number, occurs in the meristems, shoot tips and root tips, and cambium regions, 4 main phases, prophase chromatin condenses into chromosomes. Nuclear envelop develops: metaphase chromosomes align at the equatorial plate, anaphase sister chromatids separate. Interspecific crosses: interspecific hybrid within a genus, fragaria x ananassa cultivated strawberry, hybrid of two species f. chiloniesis and f. virginiania, intergeneric hybrids. Gibberella fujkuroi: ga3,ga4,ga7 most common, breaking dormancy of seeds and dormant buds, fruit development ovarian wall thickening, stimulates enzyme production (a-amylase) in germinating cereal grains. Induce parthenocarpic (seedless) fruit development: many commercial growth retardants actively block ga synthesis in the plant.
