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The length of awns in barley is controlled by two genes, C/c and D/d. The medium-length awns could be seen in barley plants with genotypes

Option: 1

C_dd


Option: 2

ccD_


Option: 3

C_D_


Option: 4

C_dd & ccD_


Answers (1)

best_answer
 

As we have studied in Polymeric gene interaction:

  • Two non-allelic genes controlling a character produce identical phenotype when they are alone, but when both the genes are present together their phenotypes effect is enhanced due to cumulative effect. 
  • This is seen in awn lengths of barley.

Hence, the correct answer is option (d).

Posted by

Ritika Jonwal

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