What is an hypothesis? 1.
an explanation why or how an event happens
2.
an experiment to prove a theory
3.
a fact supported by experimental data
4.
a demgn for an experiment

it should be 1. an explanation why or how an event happens

Explanation:

When you form a hypothesis, you are forming what you think will happen if you do this. then an experiment is usually followed shortly afterwards.

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.