update- I can keep the app but can someone explain what synthesis is please? Ion understand my biology hw

Synthesis pertains to the creation of an object, it is the process of combining 2 or more components to make an entity.

In Biochemistry, it refers to the construction of organic compound in a living thing. Especially aided by enzymes.

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.