When hybrids are crossed, the genotype ratio of the offspring is:
Correct answer: C. 1:2:1
- A. 1:1
- B. 3:1
- C. 1:2:1
- D. 4:1
- E. 3:2:1
Explanation
According to the law of segregation,when two pure breeds are crossed(e.g. RR and rr),all of the F1 generation has the dominant trait and their genotype is Rr.They are called Hybrids.When hybrids are crossed,resulting F2 generation has the phenotypic ratio of 3:1 and their genotypic ratio is 1:2:1. So,the correct Option is C.
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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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