A mass of hyphae makes up the body of a fungus, which is
called the

The filaments are called hyphae (singular, hypha). Each hypha consists of one or more cells surrounded by a tubular cell wall.

Explanation:

mass of hyphae make up the body of a fungus, which is called a mycelium (plural, mycelia). The hyphae of most fungi are divided into cells by internal walls called septa (singular, septum)

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.