Genetic Evidence of a Selective Segregation of Chromosomes in Sciara (Diptera)

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Abstract
Cytological evidence previously published indicates that in [male] of Sciara (1) a selective type of segregation occurs such that the maternal chromosomes separate bodily from their paternal mates, and (2) that 1 chromosome group (apparently always the same one) is regularly cast off in a bud which degenerates. Genetic evidence is here given which shows that in the case of the 1 chromosome pair thus far tested experimentally the [male] transmits only the maternal member. He inherits from both parents but fails to transmit the paternal chromosome. This results in a peculiar type of inheritance in which heterozygous [male] breed as if they were homozygous. In [female], segregation apparently occurs in normal mendelian fashion.

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