Multiple choice

If tall height (T) is a dominant trait and short height is a recessive trait (t) in garden pea, which of the following statements is true?

  1. TT and tt will be tall plants.

  2. TT and Tt will be tall plants.

  3. TT and tt will be dwarf plants.

  4. tt will be tail plants.

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In Mendelian genetics, a dominant trait (T) only needs one copy to be expressed. Therefore, both homozygous dominant (TT) and heterozygous (Tt) genotypes will produce tall plants, while only homozygous recessive (tt) produces short plants.