A cross between F1 hybrids and either of parents is called:
Correct answer: A. Back cross
- A. Back cross
- B. Test cross
- C. Reverse cross
- D. None of the above
Explanation
(A: Backcrossing) is a crossing of a hybrid with one of its parents. There is no "reverse cross" in genetics. A test cross is a type of back cross used to determine whether an individual expressing a dominant phenotype is homozygous or heterozygous. The question does not mention what the cross is being used for, therefore A is the most suitable choice.
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Mendel's laws explain segregation, independent assortment and the prediction of genetic ratios using alleles, genotypes and phenotypes. The chapter also covers linked genes, recombination and crossing over during meiosis, then applies pedigree reasoning to X-linked recessive traits, which show different inheritance patterns in males and females.
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