Carroll County, Iowa. Carroll County is a county located in the U.S. state of Iowa. As of the 2010 census, the population was 20,816. Its county seat is Carroll. The county is named in honor of Charles Carroll of Carrollton, signer of the Declaration of Independence.
Family tree showing the relationship of each person to the orange person, including cousins and gene share. A family tree, or pedigree chart, is a chart representing family relationships in a conventional tree structure. The more detailed family trees used in medicine and social work are known as genograms. 1 Family history representations.
Family Tree DNA is a division of Gene by Gene, a commercial genetic testing company based in Houston, Texas. Family Tree DNA offers analysis of autosomal DNA, Y-DNA, and mitochondrial DNA to individuals for genealogical purposes.amily Tree DNA's first mtDNA tests were for HVR1 (hypervariable region 1) of the mtDNA. Eventually, they added a Plus test that tested for both HVR1 and HVR2.