Question 46
Mendelian InheritanceWhich of the following statements best describes a test cross? It is
- A.to determine the genotype of an individual whose phenotype is known
- B.to determine the phenotype of an individual whose genotype is known
- C.between the progeny of parents to ascertain their external expressions
- D.between two homozygous recessive individuals to confirm the genotypes of the offspring
Show the answer and explanation
Answer: A (to determine the genotype of an individual whose phenotype is known)
Explanation
An organism showing a dominant trait is crossed with a homozygous recessive one; the offspring reveal whether it is homozygous or heterozygous.