Flower color in a particular plant species is determined by one gene. The alleles of that gene can code for either red flowers or blue flowers. When two such plants are crossed, however, some of the offspring produce purple flowers. What is the genotype of the plants with purple flowers?

an allele for red flowers on both homologous chromosomes
homologous chromosomes, and two alleles for blue flowers on the other.
chromosome and an allele for blue flowers on the other
an alle
I think B, can someone confirm

Question

Flower color in a particular plant species is determined by one gene. The alleles of that gene can code for either red flowers or blue flowers. When two such plants are crossed, however, some of the offspring produce purple flowers. What is the genotype of the plants with purple flowers? 

       an allele for red flowers on both homologous chromosomes
       homologous chromosomes, and two alleles for blue flowers on the other.
       chromosome and an allele for blue flowers on the other
       an alle
I think B, can someone confirm

abhisar · Answer

Why? It would be easier to tutor you if you explain what about the question is giving you trouble.