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So i know that the ZW determination system is the equivalent for XY in birds. Moreover, I know that the coefficient of relatedness between siblings for the X chromosome is 0.5 so im guessing that the coefficient of relatedness between siblings for the Z chromosome is the same ??

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  • $\begingroup$ Yes it would be .5 Due to reasons you correctly deduced $\endgroup$ – user42678 May 17 '18 at 12:37
  • $\begingroup$ but isnt it different between brother and sister and between sisters and between brothers. Isnt the Z chromosome considered as haploidiploid ? $\endgroup$ – Ioannis May 17 '18 at 16:20

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