Marie knows me so well!!!!!
Chip and your July 4th kitten aren't really any definite *breed* so they would be generally classified as domestic short haired (DSH) tabbies.
, I can explain what is going on with their color and markings:
First, all cats are tabbies and have at least one tabby pattern: Classic (target/blotched), Abyssinian (ticked, no/few stripes) or Mackerel (striped, broken striped or spotted). In order for these tabby patterns to be visible, the cat must have the gene called "agouti". Agouti is the gene that makes these tabby markings readily visible and recognizeable. Also, agouti only 'works' on black-based fur and not red fur. Every red cat will express at least part of their tabby pattern, but they won't have the color banded hair-shafts that an agouti cat will have.
Chip is black, with no agouti. If Chip had agouti...he would be a striped tabby cat.
Your July 4th kitten is a Calico, specifically; a Tortoiseshell calico pattern.
Torties are female cats with both the black and the red gene and no agouti...so there are no tabby markings in their black parts. Sometimes, Tortie & whites (like your kitten) are called calico, because they have three distinct colors; black, red and white.
agouti and a visible tabby pattern are called "Torbie" (Tortie + Tabby = Torbie).
Hope you enjoyed learning about your kitties!