منابع مشابه
Primary sex determination in the nematode C. elegans.
Most nematodes have XO male/XX female sex determination. C. elegans is anomalous, having XX hermaphrodites rather than females. The hermaphrodite condition appears to result from the modification of a basic male/female sex-determination system, which permits both spermatogenesis and oogenesis to occur within a female soma. This modification is achieved by a germ-line-specific control acting at ...
متن کاملMolecular mechanisms involved in mammalian primary sex determination.
Sex determination refers to the developmental decision that directs the bipotential genital ridge to develop as a testis or an ovary. Genetic studies on mice and humans have led to crucial advances in understanding the molecular fundamentals of sex determination and the mutually antagonistic signaling pathway. In this review, we summarize the current molecular mechanisms of sex determination by...
متن کاملThe primary sex determination signal of Caenorhabditis elegans.
An X chromosome counting process determines sex in Caenorhabditis elegans. The dose of X chromosomes is translated into sexual fate by a set of X-linked genes that together control the activity of the sex-determination and dosage-compensation switch gene, xol-1. The double dose of X elements in XX animals represses xol-1 expression, promoting the hermaphrodite fate, while the single dose of X e...
متن کاملSex determination
struggled for years with parasites that evolve resistance to commonly used drugs. Why should it be any different in animals? Yet as far as we know, no study has ever looked at whether parasites become resistant to the chemicals in the plants that hosts use for protection, though in the Drosophila example referenced above, ethanol did not negatively affect larvae of specialist wasps as strongly ...
متن کاملSex determination
Of all the differences that distinguish people, the most obvious and most intriguing one is their sex. The relationship between males and females has had a profound influence on human civilization, causing wars and societal up heavals, and inspiring countless works of art, music and literature. For as long as humans have both struggled with and enjoyed the existence of the two sexes, they have ...
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ژورنال
عنوان ژورنال: Arthritis & Rheumatism
سال: 1979
ISSN: 0004-3591,1529-0131
DOI: 10.1002/art.1780221107