More than one mutation of the MTHFR gene. Genes are passed down by your mother and your father. Most literature states there are a good 40-50 different mutations of this important gene which could be passed down by one, or both or your parents. Heterozygous: means you have one copy of either the 677 mutation, or the 1298 mutation, plus a normal one from the other parent. 2  Compound Heterozygous: means you have one copy of the 677 mutation from one parent and one copy of the 1298 mutation from the other parent.
Las Vegas is the largest city in the Nevada state, population of 603,488 estimates in 2013 census and covered area of 344 km 2 at the density of 1,694 inhabitants per km 2, located in the Clark County. Winchester city is with highest density of 2,489 inhabitants per km 2.
Reno has an estimated population of  237,000, which makes it the 4th most populous city in Nevada after Las Vegas, Henderson, and North Las Vegas. The Reno-Sparks metropolitan area, or Truckee Meadows, has a population of more than 500,000 people. The city proper has a population density of 2,186 people per square mile, or 844 people per square kilometer.