If a dihybrid cross is made between Pisum sativum plants producing Yellow/Round and Green/Wrinkled seeds. Results of F2 generation show:Yellow/Round- 9/16Yellow/Wrinkled-3/16Green/Round-3/16Green/Wrinkled 1/16Which ratios of these results confirm independent assortment had taken place?
Correct answer: D. 3/16 & 3/16
- A. 09/16
- B. 03/16
- C. 1/16
- D. 3/16 & 3/16
Explanation
3/16 & 3/16 is correct. As round green and yellow wrinkled are recombinant types and are not parental types. It shows that the genes are not bound to be inherited together, either gene can be inherited independent of the other. This shows that independent assortment has taken place.
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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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