Question

In pea plants, the allele for tallness(T) is dominant over the allele for shortness(t). If the two pea plants were crossed, can you predict the night of the offspring

Answer 1

The offspring inherits two alleles, one from each parent, that determine its appearance. The dominant allele determines the tallness, while the recessive allele determines shortness. When a plant inherits one, or two dominant alleles from its parents, that will define the tallness. The shortness of the offspring will appear only if the recessive allele is inherited from both of the parental plants. We have several possibilities:

parental: TT - TT offspring: TT TT TT TT
parental: Tt - Tt offspring: TT Tt Tt tt
parental: TT - Tt offspring: TT Tt TT Tt