9 : 3 : 3 : 1 ratio is given by:
Correct answer: D. F2
- A. P1
- B. F1
- C. F3
- D. F2
Explanation
A clear-cut 9:3:3:1 phenotypic ratio was found in F2. The appearance of these new recombinant phenotypes of F2 indicated that some sort of shuffling of alleles had occurred during gamete formation. Mendel inferred the mechanism of this shuffling as an independent assortment of alleles into gametes.
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About Inheritance
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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