DNA Comparison

It is important to understand that everything that is presented in this view, is based on the Focus Person or Relative that is displayed at the top left under the profile name, and the profile currently selected is technically ignored. More on this below.

DNA Segments

The left hand side section, headed “Assign MRCA to Selected DNA Segment” shows the match data for the selected Relative for all profiles in the database.

Double clicking on a segment will take you to that match on the Chromosome page to a view that is automatically filtered to show just overlapping segments with the focus person. The “Esc” key will show the entire chromosome. On the Chromosome page, this match will be highlighted in pink.

In the adjacent example, KP and HQ are the two profiles that have this match. Know which profile "owns" the segment you are assigning the MRCA for.

Assigning an MRCA

In GDAT, assigning the Most Recent Common Ancestor for a match is done by selecting the child that the profile segment descends from, not the actual common ancestor or ancestor couple.

This then correctly assigns the side and the group name for the match, and enables the segment/s to be correctly mapped in the Segment Map.

Windows users can assign an MRCA by clicking in the "Select Profile Ancestor" box and start typing the surname of the desired ancestor.

Mac users will need to scroll through the list of ancestors using the down arrow. This is an XOJO limitation.

More information about this and other ways to use this area, and other similar areas, can be found on Assigning a Side

DNA Segments Right Click Menu

Note: Right clicking (Control-Click on Mac) on a segment displays a menu with a number of commands that are associated with the segment that was selected. Pay Attention to your process.

If the match is associated with multiple profiles, the default sort is by Chr, Start and End. By clicking on the header “Profile”, the sort will change to Profile, Chr, Start, and End. Any column can be used for sorting.

Mark Side/Group sub-menu

Hide / Delete sub menu

Export sub menu

Also shown

Relatives Associated with Selected DNA Segment

When the middle panel is blank, the right click (Control-Click on Mac) menu options are simple.

Display sub-menu

Mark Side / Group sub-menu

Export sub-menu

When one of the Display options has been used, and the middle panel has been populated with data (according to what has been imported previously), the right click (Control-Click on Mac) menu options change slightly.

Search allows for a quick search for other relatives with the same name. Results will show at the right hand side.

Merge Selected Relatives allows the user to take highlighted relatives to the F5 merge screen for comparison and merging. Use Control to multi-click select multiple people.

Show Group will be displayed when the display is showing the MRCA Note.
Show MRCA Note will be displayed when Group and Status are visible.

Groups and MRCA Notes displayed are profile specific for that relative. 

The tick boxes at the bottom of the middle panel can assist with filtering ICW or triangulated relatives.

Display sub-menu

Analysis Tools sub-menu

(*) See Compare Ahnentafel Details for more information on these three comparison features.

Mark Side/Group sub-menu

Export sub-menu

Delete sub-menu

A relative from a source that provides no segmental data, will have no segments to click on, but through the right click (Control-Click on Mac) menus, you will get a number of options.

Before the central area is populated the Display sub-menu will show just two options: Show All ICW Relatives, and Show ICW Profiles.

Once the area has been populated, the right click (Control-Click on Mac) menu gives us two standard options and four further sub-menus.

Search: Allows for a search of the surname of the match to be completed. Results will display on the right hand side.

Merge Selected Relatives allows the user to take highlighted relatives to the F5 merge screen for comparison and merging. Use Control to multi-click select multiple people.

Show MRCA Note / Show Group : alternate with each other dependant on current view.

The Display sub-menu

Analysis Tools sub-menu

Mark Side / Group

Export