Question

The dominant trait for height in a particular plant is tall (T), and the recessive trait is short (1). If both parents are heterozygous for height (Tt), which ratio of oftspring will the parents produce based on Mendel's law of segregation?

Answer 1

The correct answer would be:

• Genotypic ratio: 1 (TT):2 (Tt):1 (tt)
• Phenotypic ratio: 3 (tall): 1 (dwarf)

The genotype of both the parents is Tt. Thus, both the parent will produce two types of gametes; T and t.

The offspring produced through this cross may have three types of genotypes; TT, Tt, and tt in ratio 1:2:1.

The phenotype of the offspring with genotype TT and Tt will be tall as tall is the dominant trait.

Thus, 3 out of 4 will be tall and 1 out of 4 will be dwarf.