Genetics of wheat grain color was studied by:
Correct answer: B. Nilsson-Ehle
- A. Darwin
- B. Nilsson-Ehle
- C. Mendel
- D. Correns
Explanation
Nilsson-Ehle studied the genetics of wheat grain color. When he crossed a true breeding dark red grain plant with true breeding white grain plant, all F1 grains had light red color, intermediate between two parental shades. It seemed as if it was a case of incomplete dominance. But when F1 grains were grown to mature to mature plants and crossed with each other. F2 grains had exactly seven shades of color in the ratio of 1 dark red : 6 modestly dark red: 15 red :20 light red : 15 pink : 6 light pink : 01 white.
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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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