What is the most common outcome in the F2 generation of a cross between a tall plant and a dwarf plant?
Correct answer: B. 3 tall: 1 dwarf
- A. 1 tall: 1 dwarf
- B. 3 tall: 1 dwarf
- C. 1 tall : 2 medium : 1 dwarf
- D. All tall
Explanation
If a parent is heterozygous dominant then the genotype will be Tt and Tt. Now, if you will do a cross then the result you will get is: Parents: Tt x Tt Progencies: TT, Tt, Tt, tt It gives a 3:1 ratio, i.e., three tall and one dwarf. Phenotypic ratio- 3:1 (3 Tall:1 dwarf)
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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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