Question

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.

Answer 1

have two alleles for the gene.

Explanation: Mendel’s results are explained by each plant having two alleles (one per chromosome) for the flower-color gene — a dominant allele for purple and a recessive allele for white.