WAEC Biology 2022 Objective — Question 46
Question 46 of 50 from the West African Examinations Council (WAEC) Biology 2022 Objective paper, with the correct answer and a full explanation.
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Which of the following statements best describes a test cross? It is A. to determine the genotype of an individual whose phenotype is known.
- A. to determine the phenotype of an individual whose genotype is knownCorrect
- B. between the progeny of parents to ascertain their external expressions
- C. between two homozygous recessive individuals to confirm the genotypes of the offspring
Explanation
A test cross is used to determine the genotype of an individual with a known dominant phenotype, by crossing it with a homozygous recessive individual and observing the offspring ratio.
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