What is the best definition of an allele?
select one:
the number of chromosomes present in an organism's cells
the type of molecule that forms chromosomes and genes
the physical appearance an organism has as a result of a specific gene
an alternative version of a gene

This is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 4 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 3 terms. this is a rational expression because the denominator contains a variable. this is a polynomial with 5 terms.