Question

why recessive trait can not express itself in the presence of dominant trait​

Answer 1

Answer:

In short, a dominant allele becomes a trait even if just one copy of it is present. A recessive allele does not become a trait unless both copies of the gene, one from mom and one from dad, are present. If one dominant allele and one recessive allele are present, the dominant allele trait will be expressed

Answer 2

Answer:

The main reason behind is recesive traits shows its property only with another Identical triat

For example of –"t" is trait of dwrafness but when it combines with "T" which is a trait of Tallness it does not shows its property because they are not identical (same) so on this case T becomes dominant and t becomes reccesive