Question

The two population ratio of Snyders used to test equilibrium for dominant genes are which of the following?

• A. $\dfrac{q^{2}}{(1+q)^{2}}$ and $\dfrac{q}{(1+q)}$
• B. $\dfrac{q^{2}}{(1-q)^{2}}$ and $\dfrac{q}{(1+q)}$
• C. $\dfrac{q^{2}}{(1+q)^{2}}$ and $\dfrac{q}{(1+q)^{2}}$
• D. $\dfrac{q^{2}}{(1-q)^{2}}$ and $\dfrac{q}{(1+q)^{2}}$

Hint:

Snyder’s test applies to dominant gene equilibrium; always check ratios involving $(1+q)$ in the denominator.

Answer 1

The Correct Option is A

Step 1: Recall Snyder’s test.
Snyder’s ratio is a method in population genetics used to test equilibrium conditions for dominant and recessive gene frequencies.
Step 2: Ratio definition.
It specifically compares expected ratios of genotypes using allele frequency $q$. The two ratios derived are: $\dfrac{q^{2}}{(1+q)^{2}}$ and $\dfrac{q}{(1+q)}$.
Step 3: Eliminate wrong options.
Options (2), (3), and (4) contain incorrect denominator or exponent terms, making them invalid for Snyder’s test.
Step 4: Conclusion.
Thus, the correct two population ratios are $\dfrac{q^{2}}{(1+q)^{2}}$ and $\dfrac{q}{(1+q)}$.