Answer:
Since the homozygous have 2 alleles and heterozygous have one of each. The allelic frequency of blue will be calculated as;
Step 1 Freq B
Freq B = 2×no of Blue+ No of purple/2× total number of plants
No of blue plants(BB)=342
No of violet plants(BR)=1622
No of red plants(RR)=797
Frequency of allele B= 2×342+1622/5522
Frequency of allele B=0.4176
2. Freq red
Since allelic freq should add up to 1. freq for Red will be
1-0.4176=0.5824
also using the same formula used for Blue gives the same answer.
3.Expected number for Blue, Red and Violet
a)Expected frequency=p2=0.4176² =0.1744
Expected Blue plants= 2761*0.1744=481.5184
b)Expected frequency=q2=0.5824²=0.3392
Expected Red plants=2761*0.3392=936.5312
c)Expected frequency=2pq = 2*0.4176*0.5824 = 0.4864
Expected plants=2761*0.4864= 1342.9504
