What does a test cross involve?
Answer and explanation
Correct answer: A. Crossing an individual of unknown genotype with a homozygous recessive
- Step 1: The offspring of the test cross reveal whether the unknown parent is homozygous or heterozygous. Answer: Crossing an individual of unknown genotype with a homozygous recessive. Why not the others: Crossing two heterozygotes, Crossing two homozygous dominants and Crossing a mutant with a wild type of another species don't fit.
Practise more Genetics and Molecular Biology.
Free questions with an explanation for every one, and full timed MDCAT Pakistan mock tests.