Totally agree with the others they are likelyTetra Tints or Amberlink hens (from what I can see in the photos), and that is a Dominique rooster.
I would only add just to make sure you realize some terms the next time you purchase (unless your post was simply a typo, then ignore the following)....
When you state you got straight run pullets, you are mixing terms.
A pullet is a young female chicken (before she lays eggs). Straight run means the chicks have not been sexed so you will get the luck of the draw of pullets and roos in the mix, overall works out to 50/50, but just as flipping that quarter, you could end up with a bunch of pullets or a bunch of roo's depending upon your luck. So there is no such thing as straight run pullets....you can't purchase straight run chicks and get 100% pullets (unless you are lucky). If the store marked them as such, they are inaccurate and should be told so as it is confusing to customers.
Since it appears you have purchased Amberlinks or Tetra Tints, you have Sex Links. (The store may have/should have marked as such). With Sex Link pullets, you WILL get girls only. Sex Links will be 100% accurate as the coloring of the chick (and adult bird) is linked to the sex. This is done by breeding a red based roo (such as RIR) over a white based hen (such as a White Rock or Delaware or Silver Wyandotte) for red based sex links such as the Red Star, Tetra Tint, Amber Link, Cinnamon Queen, Gold Star...etc. depending upon the flavor at the hatchery. Note sex linked hybrid works only the first generation, so only buy Sex Links from reputable feed stores and breeders...breeding two Sex Links does NOT produce color coded chicks as that trait falls away.
Sexed chicks, or more importantly sexed pullets, means that someone at the hatchery has looked closely at each chick and determined if it is a male or female. Sexing is about 90% accurate from the hatcheries, so of 10 chicks purchased, you might have 1 rooster in the batch of sexed pullets.
Just so you know, just in case you didn't.
Lady of McCamley