Genes A, B and C are linked. Genes A and B are more close than A and C. Find out correct option for

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4.Principles of Inheritance and Variation

medium

Genes $A, B$ and $C$ are linked. Genes $A$ and $B$ are more close than $A$ and $C.$ Find out the correct option for the given statements

$I.$ $A$ might be before $B$ and $C$

$II.$ $B$ might be between $A$ and $C$

$III.$ $C$ might be between $A$ and $B$

$IV.$ More crosses has occurred between $A$ and $C$ than $A$ and $B$

$I$ and $II$

$II$ and $III$

$III$ and $IV$

$I, II$ and $IV$

Solution

The more cross over between $A$ and $C$ than $A$ and $B$ will be possible only when $B$ is present in between $A$ and $C$. So by taking this consideration the sequence would be $A \rightarrow B \rightarrow C$. This gene sequence also fulfil the other statements also $(I, II, IV)$

Standard 12

Biology