안녕하세요!

Sure! Recombinant chromatids are a totally valid label.

However, these recombinant chromatids will ALWAYS break apart 

to form separate, individual "recombinant chromosomes" as the cells divide

so most of the time, people just refer to them as recombinant chromosomes for simplicity's sake.

I'm not really sure about which picture you are referring to,

so if you can upload a picture about what you are talking about, I'd be happy to clarify.

The difference between chromosomes and chromatids can be explained by genetic composition.

Let's say I received one chromosome from mom and another chromosome from dad.

They would be genetically different from each other, so we call them 2 chromosomes.

If each of these two chromosomes then undergo replication and form copies to prepare for mitosis,

each copy is now referred to as a chromatid.

Since the copies are exactly identical to the originals 

(remember we are talking about mitosis here, not meiosis, so the concept of recombination does not apply for the time being)

there is no way to distinguish which is the copy and which is the original,

so now both are just referred to as chromatids.

An easy way to visually distinguish whether you are looking at 2 chromatids, or 2 chromosomes

is to look at the middle portion called the centromere.

If the two are "tied together" at the waist, they are identical copies to each other and are 2 chromatids.

If the two are completely separate, they are 2 chromosomes.

딱 이 부분 설명하는 강의가 4.6 Cell Cycle 1 강의에서 17분쯤에 되는데

한번만 참고해보면 도움이 될거 같아요!

열공하시고 혹시 또 질문이 생기면 게시판에서 만나요! :D