Two tall plants were crossed; some of their offsprings were tall and others short the possible genotypes of the parent plants were

If two tall plants were crossed and some of their offspring were tall and others were short, then the possible genotypes of the parent plants are Tt and Tt. This is because tallness is a dominant trait and shortness is a recessive trait. Each parent plant would have had one allele for tallness (T) and one allele for shortness (t), making them both heterozygous for the trait. When the two parent plants are crossed, their offspring inherit one allele from each parent, giving them a 50% chance of inheriting the dominant T allele and being tall, and a 50% chance of inheriting the recessive t allele and being short. Therefore, some offspring will be homozygous dominant (TT), some will be heterozygous (Tt), and some will be homozygous recessive (tt), resulting in a 3:1 phenotypic ratio of tall to short plants.