Question

Blood group	Genotype	No. of individuals
M	${ L }^{ M }{ L }^{ M }$	1787
MN	${ L }^{ M }{ L }^{ N }$	3089
N	${ L }^{ N }{ L }^{ N }$	1303

Calculate the frequency of ${ L }^{ N }$ alleles
(a) $54\%$
(b) $64\%$
(c) $46\%$
(d) $36\%$

Answer 1

It refers to how common an allele is in a population. For instance, if all the alleles during a population of pea plants were purple alleles, W, the allele frequency of W would be $100\%$, or 1.0. Nonetheless, if a half portion of the alleles were W and half were w, every allele would have an allele recurrence of fifty, or 0.5.

Complete answer:
According to the question,
Step 1- Find the total no. of LM and LN alleles present in the total no. of individuals,
Step 2- Estimate their frequency by dividing the entire no. of LN alleles by the total no. of LM and LN alleles which will be $3039+2606/12258$.
Step 3- At that point you will get 0.460 which implies $46\%$ of LN alleles are available.
The allele frequency is different from the phenotypic ratio therein it accounts for all alleles, albeit they're recessive and are “hidden” within carrier organisms. The phenotypic proportion just portrays the phenotype or real actual highlights that are available inside a population.
To discover the allele frequency, researchers must think about heterozygous people, which might be concealing a passive allele.
using the Hardy-Weinberg equation allele frequency is most commonly calculated, which describes the relationship between two alleles within a population. When quite two alleles are present, scientists must use more complex methods to work out the particular allele frequency. Allele frequency can change over time as evolution acts upon a population and therefore the population adapts by increasing or decreasing the frequency of certain alleles.

So, the correct answer is ‘$46\%$’.

Note:
A common misconception of allele frequency is that it is directly related to the evolutionary fitness of a particular allele. Just because an allele is frequent or infrequent has no pertaining to the fitness of that allele. For example, many recessive traits that are deleterious “hide” during a population. This can mean that while it appears to exist at really low levels, it's actually just hiding within the hybrids of the population.