Question

Each of the following sub-parts, (i) to (iv) has four choices. Choose the best option:

Study the given monohybrid cross:

A test cross for this F1 will be:

Options

• Tt × TT

• Tt × tt

• Tt × Tt

• TT × tt

Answer 1

Tt × tt

Explanation:

A test cross pairs the individual of unknown genotype with a homozygous recessive individual. The other options use a homozygous dominant or heterozygous partner, or show the original parental cross.