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Question

(B) The correct matches are as follows:$1$. $P$. $XO$ type: This mechanism is observed in insects like grasshoppers,where males have one $X$ chromosom

Vedclass · Accepted Answer

$(P-I), (Q-III), (R-II)$

Vedclass · Answer

(B) The correct matches are as follows:$1$. $P$. $XO$ type: This mechanism is observed in insects like grasshoppers,where males have one $X$ chromosome and females have two $(XX)$. Thus,$P-I$.$2$. $Q$. Haplo-diploid mechanism: This is a unique sex determination system found in honey bees,where females are diploid $(2n)$ and males are haploid $(n)$. Thus,$Q-III$.$3$. $R$. $XY$ type: This is the common sex determination mechanism found in Drosophila (fruit flies) and humans,where males are $XY$ and females are $XX$. Thus,$R-II$.Therefore,the correct sequence is $(P-I), (Q-III), (R-II)$.

Column-$I$ (Mechanism of Sex Determination)	Column-$II$ (Example)
$P$. $XO$ type	$I$. Grasshopper
$Q$. Haplo-diploid mechanism	$II$. Drosophila
$R$. $XY$ type	$III$. Honey bee

Match the following columns:

Column-$I$ (Mechanism of Sex Determination) Column-$II$ (Example)

$P$. $XO$ type $I$. Grasshopper

$Q$. Haplo-diploid mechanism $II$. Drosophila

$R$. $XY$ type $III$. Honey bee

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Match the following columns: Column-$I$ (Mechanism of Sex Determination) Column-$II$ (Example) $P$. $XO$ type $I$. Grasshopper $Q$. Haplo-diploid mechanism $II$. Drosophila $R$. $XY$ type $III$. Honey bee