The results of autosomal DNA tests can also be used in research studies. These tests can also tell you with almost 100 percent accuracy whether youвЂ™re a carrier of an inherited condition or have the condition yourself.Д«y looking at the traits within the genes on each of your autosomal chromosomes, the test can identify mutations, either dominant or recessive, associated with these conditions.

This is one of the most popular uses for autosomal DNA kits from companies like 23andMe, AncestryDNA, and MyHeritage DNA. This is how these DNA tests can suggest your ancestral ethnic and racial background and what regions of the world your DNA comes from.

This means that these DNA tests can help trace your DNA and the DNA of those distantly related to you back to where those genes first came from, sometimes back several generations. Those who share the same ancestors will have similar autosomal gene sequences. This is done by finding specific variations in your genes and putting them in groups with other DNA samples that have similar variations. This is because the facility has a larger pool of DNA for comparison.ДЄutosomal DNA tests can tell you a lot about your ancestry and your chances of getting certain conditions with a pretty high level of accuracy. The larger a testing facilityвЂ™s database of DNA, the more accurate the results. The facility then analyzes your DNA sequence and matches your DNA to others who have submitted their DNA for testing. In this scenario where each parent has one affected gene, their child has a 50 percent chance of being a carrier, a 25 percent chance of not having the condition or being a carrier, and a 25 percent chance of having the condition.ДЄutosomal DNA testing is done by providing a sample of your DNA - from a cheek swab, spit, or blood - to a DNA testing facility.

You inherit an affected gene from both parents.

You donвЂ™t have the condition, and you arenвЂ™t a carrier.

You inherit an unaffected gene from both parents.

You are a carrier but you donвЂ™t have the condition.

You inherit an affected gene from your mother and an unaffected gene from your father.

You are a carrier, but you donвЂ™t have the condition.

You inherit an affected gene from your father and an unaffected gene from your mother.

There are four possibilities for inheritance, each with a 25 percent chance of occurrence: LetвЂ™s say both of your parents have one copy of the gene that causes cystic fibrosis. In the case of an autosomal recessive condition, you need to inherit an affected gene from each parent in order to have the condition. This means that you donвЂ™t have the trait or condition, but you may have the gene for a trait and can pass it on to your children. If just one parent passes on a gene for a recessive trait, such as red hair, or condition, such as cystic fibrosis, youвЂ™re considered a carrier. Autosomal recessiveДЇor autosomal recessive genes, you need one copy of the same gene from each parent for the trait or condition to be expressed in your genes. However, you can also get an autosomal dominant condition without either parent having an affected gene. But if that one parent has two affected genes, thereвЂ™s a 100 percent chance youвЂ™ll be born with it. In the scenario above, you have a 50 percent chance of inheriting the condition. In other words, you only need one of your parents to pass an autosomal dominant condition on to you.

You inherit the unaffected gene from your father as well as one of your motherвЂ™s unaffected genes.

You inherit the affected gene from your father as well as one of your motherвЂ™s unaffected genes.

There are two possibilities for inheritance in this scenario, each with a 50 percent chance of occurrence: LetвЂ™s say your father has just one copy of a mutated gene for an autosomal dominant condition. This is true even if another gene in the same autosome is a completely different trait or a mutation. With this category, you only need one of these genes to be passed onto you from either parent to receive that trait. HereвЂ™s a quick breakdown of the difference. These categories are called autosomal dominant and autosomal recessive. Within these 22 autosomes are two categories of genes that pass on different traits and conditions from your parents.

Examples of autosomal dominant traits