In a group of rose plants, some individuals have thorns and others do not. In this group, the gene for the thorns trait has two alleles. The allele R is for having thorns, and the allele r is for not having thorns.

Question

In a group of rose plants, some individuals have thorns and others do not. In this group, the gene for the thorns trait has two alleles. The allele R is for having thorns, and the allele r is for not having thorns.

A certain rose plant from this group does not have thorns. This plant has two alleles for not having thorns.
Based on this information, what is this rose plant's phenotype for the thorns trait?

Answer 1

In a group of rose plants, some individuals have thorns and others do not. In this group, the gene for the thorns trait has two alleles. The allele R is for having thorns, and the allele r is for not having thorns.

This rose plant's phenotype for the thorns trait would be without thorns, since it has two copies of the allele for not having thorns (rr).