Question

A true breeding plant is -

• A. one that is able to breed on its own
• B. produced due to cross-pollination among unrelated plants
• C. near homozygous and produces offspring of its own kind
• D. always homozygous recessive in its genetic constitution

Answer 1

The Correct Option is C

True Breeding Line 

A true breeding line is one that, having undergone continuous self-pollination, exhibits stable trait inheritance and expression over several generations. In genetics, a true breeding line refers to organisms that consistently pass on the same traits to their offspring, ensuring that the traits are maintained through generations.

This stability of inheritance occurs because the organisms are homozygous for the trait in question. Homozygosity means that both alleles for a particular gene are the same, whether they are dominant or recessive. A true breeding line can be homozygous dominant (e.g., TT) or homozygous recessive (e.g., tt), depending on the trait being studied.

Key Points:

• The organism has undergone continuous self-pollination.
• The trait inheritance and expression remain stable over several generations.
• It can be homozygous dominant or homozygous recessive.

In summary, a true breeding line is a genetic line that, through generations of self-pollination, consistently exhibits the same trait expression, either dominant or recessive, due to homozygosity for the trait.