The answer is 0.3 (violet flower allelic frequency) and 0.7 (white flower allelic frequency)
Alleles are different forms of a gene. There can be recessive alleles (v) and dominant alleles (V) that can mask recessive alleles when found together. Allelic frequencies are:
p for dominant allele V
q for recessive allele v
Genotypes can be:
VV - dominant homozygote with violet flowers and with frequency p²
Vv - heterozygote with violet flowers and with frequency 2pq
vv - recessive homozygote with white flowers and with frequency q²
It is given 98 flowers out of 200 are white with frequency q²:
q² = 98/200 = 0.49
From here, we can calculate the frequency of recessive allele v:
q = √q² = √0.49 = 0.7
Since we know q, using the formula p + q = 1, we can calculate the frequency of dominant allele V is:
p + 0.7 = 1
⇒ p = 1 - 0.7 = 0.3
