How many types of sex determination mechanism | vedclass

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(C) The mechanisms of sex determination that involve dissimilar sex chromosomes are as follows:$(i)$ $XY$ type (e.g.,humans,where males are $XY$ and f

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$4$

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(C) The mechanisms of sex determination that involve dissimilar sex chromosomes are as follows:$(i)$ $XY$ type (e.g.,humans,where males are $XY$ and females are $XX$)$(ii)$ $XO$ type (e.g.,grasshoppers,where males are $XO$ and females are $XX$)$(iii)$ $ZW$ type (e.g.,birds,where females are $ZW$ and males are $ZZ$)$(iv)$ $ZO$ type (e.g.,some butterflies and moths,where females are $ZO$ and males are $ZZ$)Thus,there are $4$ such conditions where dissimilar sex chromosomes are involved in sex determination.

How many types of sex determination mechanisms exhibit dissimilar sex chromosomes?

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