What is pedigree analysis ? Why it is important tool is human genetics. ?

In pedigree analysis symbol Θ used for

Why is pedigree analysis done in study of human genetics ? State the conclusions that can be drawn from it.

In a pedigree analysis =0 represetns

In pedigree analysis, what is indicated by this symbol:

What is pedigree analysis? Suggest how such an analysis, can be useful.

Pedigree analysis || NCERT book discussion

Why are vegetables important for human body ?