The equilibrium of gene frequencies is known as .....

Lesch-Nyhan disease is an $X$-linked recessive disorder that causes neurological damage in human beings. $A$ survey of $500$ males from a Caucasian population revealed that $20$ were affected with this disorder. What is the frequency of the normal allele in this population?

If $98$ members out of $200$ in a population express the recessive phenotype,what is the percentage of heterozygotes in that population?

Which of the following is the correct formula for the Hardy-Weinberg principle?

If the measured allele frequency differs from the expected value,what does it indicate?

Explain the Hardy-Weinberg principle using an algebraic equation.