You get your AncestryDNA results back, and everything looks straightforward at first. A pie chart of percentages, a list of regions, a rough map of the world with your ethnicity highlighted.
Then you click into Origins and land on a screen you were not expecting. Rows of thick, colorful bars stacked on top of each other, labeled Parent 1 and Parent 2, with no real explanation of what any of it means or which parent is which.
That screen is the AncestryDNA chromosome painter, and it is one of the more useful, and more confusing, tools Ancestry has added to DNA results in the last few years. This guide walks through what it shows, how to read it, and how to figure out which side of your family, Parent 1 or Parent 2, actually passed down which parts of your ethnicity.
What the Chromosome Painter Actually Shows You
The chromosome painter is built on top of a piece of AncestryDNA technology called SideView.
SideView takes your raw ethnicity estimate, the same percentages you see on your main results page, and splits it into two sides. It does this by comparing your DNA against the DNA of your matches, using a statistical process called phasing to work out which parts of your genome most likely came from one parent and which came from the other.
The chromosome painter takes that same split and lays it out visually, chromosome by chromosome, instead of as a simple side by side percentage breakdown. You get to see exactly where in your DNA each ethnicity shows up, not just how much of it you have overall.
What You Need Before You Can Use It
The chromosome painter sits behind a paywall. You need an active Ancestry family history membership to open it, not just a basic AncestryDNA test.
If you have only ever paid for the DNA kit itself and never subscribed to a membership tier, you will see your ethnicity percentages but not the chromosome level breakdown underneath them. It is worth knowing this before you go looking for a feature that turns out to be locked.
How to Find the Chromosome Painter in Your Account
Finding the chromosome painter takes a few clicks, and Ancestry has rearranged its menus enough over the years that it is easy to end up in the wrong section.
Start from any page on Ancestry and open the DNA tab at the top of the screen, then select Origins from the menu. From your Origins results, look for an option labeled By parent. Selecting that will bring up three different ways to view your ethnicity split by parent, and one of those options is the chromosome painter itself.
Choose it, and you will land on a screen showing all of your autosomal chromosomes at once, with an option to filter the view down to just Maternal or just Paternal once you know which side is which.
Reading the Chromosome Painter Screen
Once the chromosome painter loads, you will see 22 chromosome pairs laid out in rows, numbered from largest to smallest the same way scientists number them. Your 23rd pair, the sex chromosomes, is left out of this view entirely, since that pair works differently and is not part of what the chromosome painter analyzes.
Each chromosome is shown as two bars stacked together, one representing the copy you got from one parent and one representing the copy from the other. Every bar is colored in short segments, and each color corresponds to a specific ethnicity region, using the same color key from your main ethnicity results. A long stretch of one color might mean Scottish ancestry, a short patch of another might mean Northern Italian, and so on, depending on your own results.
You can toggle between different views near the top of the screen. An all parents view shows both sides at once, layered together. Isolating a single parent lets you look at just their contribution, without the other bar in the way, which makes individual regions much easier to trace.
Why Everything Starts as Parent 1 and Parent 2
Ancestry has no way of knowing, on its own, which side is your mother and which is your father. The phasing process that splits your DNA into two groups works purely off of statistics and shared matches, and statistics do not come labeled by gender.
That is why every new chromosome painter starts out generic, with both sides sitting under the neutral labels Parent 1 and Parent 2, until you tell Ancestry otherwise.
How to Tell Which Parent Is Which
Figuring out which label belongs to your mother and which belongs to your father usually takes a little detective work, but most people can sort it out with information they already have.
Using Ethnicities You Already Know
The fastest method is comparing your results against ethnicity you already know runs in one side of your family.
If you know your mother's side has been in Puerto Rico for generations and your father's side is entirely Scandinavian, and one of the two chromosome painter sides is dominated by Iberian Peninsula and Indigenous Americas regions while the other is almost entirely Norwegian and Swedish, the match is obvious.
This works best when your parents come from noticeably different backgrounds. If both of your parents share a similar ethnic makeup, this method gets harder, and you may need to lean on the next one instead.
Using a Known DNA Match
If you have a DNA match on Ancestry who you already know is related to you through one specific parent, such as a first cousin you know is on your father's side, that match gives you a far more reliable clue than ethnicity alone.
Ancestry's shared matches and common ancestor tools can often tell you which side of your chromosome painter that cousin lines up with. Once you know that, the entire Parent 1 or Parent 2 label for that side is settled with actual confidence, not just a guess based on percentages.
Renaming Parent 1 and Parent 2
Once you are confident which side is which, you do not have to keep looking at generic labels forever.
From the main Ethnicity Inheritance page, there is an option to edit your parents, which lets you replace Parent 1 and Parent 2 with actual names or relationships, such as Mom and Dad. It is a small change, but it makes the whole tool considerably easier to read every time you come back to it.
Understanding the Colors, Gaps, and Unassigned Segments
Not every part of every chromosome will be colored in. Small gray or blank sections are normal, and they usually fall into one of two categories.
Some segments are simply not tested, meaning that particular stretch of DNA is difficult for current science to read reliably, so Ancestry leaves it out rather than guess. Other segments are labeled unassigned, which means Ancestry detected a very small trace, generally under half a percent, of a particular region, but was not confident enough in that trace to formally include it in your results.
Both are normal, and neither one means anything went wrong with your test.
Quick Glossary of Chromosome Painter Terms
A handful of terms come up constantly once you start using this tool, so here is a quick reference you can come back to.
| Term | What It Means |
|---|---|
| SideView | Ancestry's technology that splits your ethnicity results into two parental sides using phasing, without requiring either parent to have tested. |
| Phasing | The statistical process of sorting which parts of your DNA most likely came from each parent, based on comparisons with your matches. |
| Parent 1 / Parent 2 | The default, gender neutral labels Ancestry assigns to each side of your chromosome painter until you identify and rename them. |
| Unassigned | A small ethnicity trace, generally under half a percent, that Ancestry detected but was not confident enough to formally include. |
| Not Tested | A stretch of DNA that current science cannot reliably read, so Ancestry leaves it blank rather than guess. |
Why Your Results Might Shift Over Time
Ethnicity estimates are not fixed the moment your test finishes processing. Ancestry regularly updates its reference panels and algorithms as its database of tested customers grows, and those updates can shift your percentages, sometimes by a little and sometimes by a noticeable amount.
The chromosome painter tends to show these shifts more clearly than your main ethnicity results do, simply because it is working at a more detailed level. A change that barely moves your overall percentage for a region can still visibly move where that region's color sits on a specific chromosome.
If you check back on your results after Ancestry announces an update and the painting looks different than you remember, that is expected behavior rather than a mistake.
What the Chromosome Painter Cannot Tell You
It is worth being clear about the limits of this tool so you do not expect more from it than it can deliver.
The chromosome painter shows you ethnicity regions, not individual ancestors. A colorful segment linked to Germanic Europe tells you that some ancestor from that region passed down that piece of DNA, but it will not tell you which specific great grandparent it came from or when they lived.
It also will not hand you exact segment start and stop coordinates the way a dedicated chromosome browser built for genealogists might. Ancestry has redesigned this interface more than once, and detailed segment data that was easier to pull in earlier versions is not always available in the same way today. If you want to layer your AncestryDNA results into a full chromosome map alongside matches from other testing companies, you may need a third party tool built for that purpose rather than relying on the painter screen alone.
Turning Chromosome Data Into Family Stories
It is easy to get lost in the colors and the percentages and forget what they actually represent.
Every segment on that screen traveled through a real person to reach you. A patch of color on chromosome six is there because a specific ancestor, with a name and a face and a life nobody wrote down, existed and had children, who had children, until eventually they had you.
That is the part a chromosome painter cannot show. It can tell you where a piece of DNA came from. It cannot tell you what that person was like, what they were afraid of, or what they hoped for their kids. Those details only survive if somebody writes them down while there is still someone around to ask.
If your own chromosome painter sends you down a rabbit hole of family history questions, it might be worth turning some of that curiosity toward the relatives you can still talk to.
Memoracy gives people a simple daily prompt to record their own life story in their own words, so the answers to those questions do not have to rely on DNA and guesswork a generation from now.
Sign up and start your first story on Memoracy today.
