Chromosome mapping is a technique used in autosomal DNA analysis which allows a person to determine which segments of DNA came from which ancestor. In order to map DNA segments on specific chromosomes, you should test a number of close family relatives, for example, parents, children and cousins.
Information from Internet on-line services may be passed on in good faith, but does not mean it is correct. Look for sources and documentation, and then check them.
Nebraska held a state census in the following years: 1855 and 1885.