Y chromosome has two types of polymorphism : metacentric ( or submetacentric ) and acrocentric chromosomes.

染色体有中部 ( 或亚中部 ) 和近端着丝粒染色体.

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Y - chromosome is a middle - sized acrocentric .

Y为 中型 近端着丝粒染色体.

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The X chromosomes were all submeta - centric and the Y chromosomes were acrocentric in five breeds.

X染色体均为近中着丝粒染色体,Y染色体为近端着丝粒染色体.

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