The various forms of a single gene that code for brown, blonde, or red hair are called genotype. For example, Bb and Dd.
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. That means that they will never be a copy of their parents because of their different genetic material. Characteristics, such as eye color, hair type and color, the shapes of facial features, and height and build, and attribute the combinations of these to the portions of DNA inherited from each parent which makes them different but still carry the DNA of their parents.
Spectral analysis proposes that there is no hydrogen fusion roughly
speaking. They are hot since they are very thick. So if you are a convinced
high density and temperature and still not doing synthesis, you must be small.
Also, stellar evolution models are founded on the observation of planetary
nebulae, where stars have shed most of their mass after being red giants. The
physics designates a small, hot, central remainder.