Genetics Search by Checkboxes

I LOVE the ability to search for horses with specific coat patterns. Trouble is, it's just a little bit tedious. I would love to see a system that allows a user to search for all Tobiano horses (TT, Tt, RnT, TSb, etc), for example - horses that have at least one T. Same with other genes. Would this be useful to you?

The only exception I can think of is genes that will only be expressed as homozygous recessive, such as Flaxen. I don't know of any others. In that case, the search would be for "at least one recessive gene" (ff or Ff).

For me, this mainly affects the KIT gene, since there are so many variations to search. I would guess Appaloosa, however I don't breed them, so I wouldn't know.

Support. This would be useful for even just simple searches, like finding bay based horses. Searching by colour would be tedious as there's so many different combinations, but searching by genetics you may just want Aa or AA or AAt. Checkboxes would allow you to search for horses that had any of several possibilities.