2. What is the difference between a gene and an allele?

A gene is a proportion of DNA that determines a certain trait.

An allele is a specific form of a gene

Genes are responsible for the expression of traits

Alleles are responsible for the variations in which a given trait can be expressed

Hope this is what you wanted. Good luck :)

A gene is a unit of hereditary information. ... The short answer is that an allele is a variant form of a gene. Explained in greater detail, each gene resides at a specific locus (location on a chromosome) in two copies, one copy of the gene inherited from each parent. The copies, however, are not necessarily the same.

4, two dominant and two recessive