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(B) To study linkage,a test cross is performed between a dihybrid individual $(AaBb)$ and a homozygous recessive individual $(aabb)$.However,in the gi

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$AABB 	imes aabb$

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(B) To study linkage,a test cross is performed between a dihybrid individual $(AaBb)$ and a homozygous recessive individual $(aabb)$.However,in the given options,we look for a cross that produces a dihybrid $(AaBb)$ in the $F_1$ generation,which is then used for linkage analysis.The cross $AABB 	imes aabb$ produces $AaBb$ in the $F_1$ generation.This $F_1$ dihybrid is then test-crossed with a double recessive parent $(aabb)$ to observe the linkage between genes.Therefore,the cross $AABB 	imes aabb$ is the standard starting point for creating the dihybrid required to study linkage.

Which of the following is suitable for the study of linkage?

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