Question

Pure yellow seeded plant is crossed with green seeded plant .Is this an example of monohybrid or dihybrid cross? what is the phenotype in F1 generation? what is the ratio of the phenotype and genotype in F2 generation? which other contrasting trait pair can be taken?

Answer 1

It is an example of Mono hybrid cross. the phenotype in this case would be heterozygous  yellow if yellow is dominant or heterozygous green if green is dominant in F1 generation
phenotype ratio in F2 generation would be 1:2:1
genotype  ratio in F2 generation would be  3:1

other traits like tallness and drawfness, white flowers and purple flowers etc. could be taken.