Question

4. In garden pea plants, tall plants are dominant to short plants.Cross two heterozy gous plants.What are all the possible genotypes of the offspring?

Answer 1

Let's use a T for tall and t for short.  The genotype of a heterozygous plant will be Tt, which is a tall plant that carries the short gene.  After a monohybrid cross, the results are 25% TT (homozygous dominant, tall), 50% Tt (heterozygous, tall), and 25% tt (short).  75% are tall, 25% are short, or 3:1 tall to short.