Y chromosome has two types of polymorphism : metacentric ( or submetacentric ) and acrocentric chromosomes.
染色體有中部 ( 或亞中部 ) 和近端著絲粒染色體.
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Y - chromosome is a middle - sized acrocentric .
Y為 中型 近端著絲粒染色體.
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The X chromosomes were all submeta - centric and the Y chromosomes were acrocentric in five breeds.
X染色體均為近中著絲粒染色體,Y染色體為近端著絲粒染色體.
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"an acrocentric chromosome"