Why do our traits disappear or even appear throughout our bloodline? can someone explain it to me, because ı am confused.

Because of mating and random errors

21 hours ago, geneticenthusiast said:

Why do our traits disappear or even appear throughout our bloodline? can someone explain it to me, because ı am confused.

Albinism can show up, you just need two heterozygous individuals. Phenotypically normal.

Recessive traits can appear like this.

23 hours ago, geneticenthusiast said:

Why do our traits disappear or even appear throughout our bloodline? can someone explain it to me, because ı am confused.

It seems to me the term "bloodline" doesn't have much meaning, scientifically. Given that each generation has 2 parents, extrapolating ancestry back over many generations gives rise to a rapidly branching tree, receding into the past, not a line. For example, if you go back 4 generations from a given individual, their genetic makeup is composed of 1/16th each from 16 ancestors. So I cannot see how a "bloodline" can have any biological meaning.

My impression is it is a cultural term, used to denote the ancestry of surnames, which traditionally follow the males of each generation, ignoring the equal genetic contributions to each generation from females, who belong to different "bloodlines", i.e. have different surnames.