Question

the offspring of a particular cross are 100 percent heterozygous for the trait of plant height. what were the most likely genotypes of the parents?
o tt tt
o tt tt
o tt tt
o tt tt

Explanation:

Let's analyze each option:

• If parents are \( TT\times tt\):
• Using Punnett square, all offspring will be \( Tt\) (heterozygous).
• If parents are \( Tt\times Tt\):
• Offspring genotypes: \( TT:Tt:tt = 1:2:1\), not all heterozygous.
• If parents are \( tt\times tt\):
• All offspring will be \( tt\) (homozygous recessive).
• If parents are \( TT\times Tt\):
• Offspring genotypes: \( TT:Tt= 1:1\), not all heterozygous.

Answer:

\( TT\times tt\)