A Female Mouse from a True-Breeding Wild-Type Strain Was Crossed $$\begin{array} { | l | l | } \hline \text { all wild type } & 200 \\\hline\end{array}$$

question 63

Multiple Choice

A female mouse from a true-breeding wild-type strain was crossed to a male mouse with apricot eyes (ap) and grey body (gy) .The F₁ mice were wild-type for both traits.When the F₁ were interbred, the F₂ were distributed as follows: Females
$$\begin{array} { | l | l | } \hline \text { all wild type } & 200 \\\hline\end{array}$$ Males
$$\begin{array} { | l | r | } \hline \text { wild type } & 91 \\\hline \text { apricot } & 11 \\\hline \text { grey } & 9 \\\hline \text { apricot, grey } & 89 \\\hline\end{array}$$ Which of the following statements is correct?

• A)ap and gy are unlinked
• B)ap and gy are linked on an autosome and 10 map units apart
• C)ap and gy are linked on an autosome and 20 map units apart
• D)ap and gy are X-linked and 10 map units apart
• E)ap and gy are X-linked and 20 map units apart

---

Definitions:

Frequency Distribution

The representation, either in a graphical or tabular format, of how often each value in a set of data occurs.

Cumulative Frequency

The sum of the frequencies of all values that are less than or equal to a certain value, often used in statistical analysis to determine the number of observations below a specific value.

Relative Frequency

Relative frequency is the proportion or ratio of the number of times a value occurs in a dataset to the total number of observations.

Examination Scores

Quantitative measures that represent an individual's level of performance or achievement on a standardized test or examination.