Willcox, Arizona Border Patrol, and Safeway. NatureSweet has a greenhouse outside town. The Willcox wine region produces 74% of the wine grapes grown in the state of Arizona. Grape varietals grown include Petite Sirah, Malvasia Bianca, Sangiovese, Chenin blanc, Syrah, Colombard, Sauvignon blanc, Corvina, Merlot, Malbec, Tannat, Cabernet Franc, Chardonnay, Tempranillo, Cabernet Sauvignon and Mourvèdre. As of the census of 2000, there were 3,733 people, 1,383 households, and 947 families residing in the city. The population density was 622.3 people per square mile (240.2/km²). There were 1,652 housing units at an average density of 275.4 per square mile (106.3/km²). The racial makeup
Petite mutation Petite mutation petite (ρ–) is a mutant first discovered in the yeast "Saccharomyces cerevisiae". Due to the defect in the respiratory chain, 'petite' yeast are unable to grow on media containing only non-fermentable carbon sources (such as glycerol or ethanol) and form small colonies when grown in the presence of fermentable carbon sources (such as glucose). The petite phenotype can be caused by the absence of, or mutations in, mitochondrial DNA (termed "cytoplasmic Petites"), or by mutations in nuclear-encoded genes involved in oxidative phosphorylation. A neutral petite produces all wild type progeny when crossed with wild type. petite mutations can