Question

Why is Mendel’s Second Law not always valid for two or more phenotypical traits of an individual?

Answer 1

Mendel’s second law, or the law of the independent collection, is valid for genes positioned in distinct chromosomes. those genes segregate independently at some stage in meiosis.

but, Mendel’s second law isn't always legitimate for pheno ordinary capabilities conditioned through genes placed within the identical chromosome (genes underneath linkage), due to the fact that these genes, referred to as related genes, do not separate for the duration of meiosis (except for the phenomenon of crossing over).