In the garden pea population, the emergence of plants producing yellow and green beans is observed. The yellow color is dominant. The share of plants producing green beans is 81%. What is the frequency of homo- and heterozygous plants in this population?
1) Determine the frequency of occurrence of the recessive allele. From the condition of the problem it follows that gg2 = 0.81, then:
2) Determine the frequency of occurrence of the dominant allele:
p = 1 – g = 1 – 0.9 = 0.1
3) Determine the genotypic structure of the pea plant population:
(0.1 + 0.9) 2 = 0.01 AA + 0.18 Aa + 0.81 aa
Answer: 1% aa: 18% aa: 81% aa
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