A test cross is carried out to

(A)determine the genotype of a plant at F2
(B)predict whether two traits are linked
(C)assess the number of alleles of a gene
(D)determine whether two species or varieties will breed successfully

The NCERT line that answers it

Verbatim line

Therefore, to determine the genotype of a tall plant at $F_2$ , Mendel crossed the tall plant from $F_2$ with a dwarf plant.

Chapter: Principles of Inheritance and Variation
Section: 4.2 INHERITANCE OF ONE GENE
Page: 7
Words matched: 36 of 36

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

0, emb=1.0, combined=1.0). Verified: high — The span explicitly states 'to determine the genotype of a tall plant at F2, Mendel crossed the tall plant from F2 with a dwarf plant', which directly matches option A's claim that a test cross is carried out to determine the genotype of a plant at F2.

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