Two pure lines of barley differing in a gene for reduced plant


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6.99

Two pure lines of barley differing in a gene for reduced plant height were crossed. The symbol for the gene is rh. The genotype of line 1 is rh1 rh1 and that of line 2 is rh2 rh2. The two pure lines did not differ in any other gene pair affecting plant height. The mean height of pure line rh1 rh1 was 50 cm and that of pure line rh2 rh2 was 100 cm. The mean height of the F1 heterozygote rh1 rh2 was 65 cm. The dominance relationship between the rh1 and rh2 alleles is

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