Answer:
Red segregated from brown in meiosis I, and straight segregated from curled in meiosis I.
Step-by-step explanation:
According to independent assortment genes for different traits separate independent of each other. Hence in a dihybrid cross the progeny comes out in 9 : 3 : 3 : 1 ratio. Here the same ratio is observed in a dihybrid cross hence the two genes assort independently.
According to law of segregation, alleles of a gene separate from each other during gamete formation. It can be observed during meiosis I. Homologous chromosomes line up in random orientations in middle of the cells. The chromosomes cross over and then separate. Hence, here the red trait segregated from brown and straight segregated from curled in Meiosis I. It is called as reductional division as after it chromosome number reduces from diploid to haploid.