My family has an orange and white female cat, which is uncommon. Please describe her possible inheritance. (You may need to research this!)

That orange and white cat next door could be an American Bobtail, a Persian, a Munchkin or even a Maine Coon! Their orange color comes from a predominance of a pigment called pheomelanin. This is the same pigment that makes some humans “redheads”.

A
Before meiosis begins, during S phase of the cell cycle, the DNA of each chromosome is replicated so that it consists of two identical sister chromatids, which remain held together through sister chromatid cohesion. This S-phase can be referred to as "premeiotic S-phase" or "meiotic S-phase".