Mendel’s pea plants had either purple or white flowers. this means that the plants
can self-pollinate.
have two recessive traits.
have two alleles for the gene.
have two copies of a gene from one parent.

The correct answer is "have two alleles for the gene".

Alleles are referred to as two or more alternative forms of the gene located at the same loci in homologous chromosomes.

They code for contrasting characteristic or phenotype.

For example, tall and dwarf, green and yellow pea color, round and wrinkled pea shape etc.

Similarly, white and purple color or flowers is also a type of contrasting trait controlled by two alleles of the gene.

they absorb it i think

not sure

you