Results 261 to 270 of about 314,234 (309)
Some of the next articles are maybe not open access.
Sex Determination in the Hymenoptera
Annual Review of Entomology, 2008The dominant and ancestral mode of sex determination in the Hymenoptera is arrhenotokous parthenogenesis, in which diploid females develop from fertilized eggs and haploid males develop from unfertilized eggs. We discuss recent progress in the understanding of the genetic and cytoplasmic mechanisms that make arrhenotoky possible.
George E Heimpel, Jetske G De Boer
exaly +3 more sources
Seminars in Cell and Developmental Biology, 2007
Sex determination is an intriguing system in trioecious papaya. Over the past seven decades various hypotheses, based on the knowledge and information available at the time, have been proposed to explain the genetics of the papaya's sex determination.
Ray Ming, Qingyi Yu, Paul H Moore
exaly +3 more sources
Sex determination is an intriguing system in trioecious papaya. Over the past seven decades various hypotheses, based on the knowledge and information available at the time, have been proposed to explain the genetics of the papaya's sex determination.
Ray Ming, Qingyi Yu, Paul H Moore
exaly +3 more sources
Transitions in sex determination and sex chromosomes across vertebrate species [PDF]
Molecular Ecology, 2018 Despite the prevalence of sexual reproduction across eukaryotes, there is a remarkable diversity of sex determination mechanisms. The underlying causes of this diversity remain unclear, and it is unknown if there are convergent trends in the ...
Matthew W Pennell +2 more
exaly +2 more sources
Sex determination and sex reversal
Current Opinion in Genetics & Development, 2006Sex determination in mammals is based on a genetic cascade that controls the fate of the gonads. Gonads will then direct the establishment of phenotypic sex through the production of hormones. Different types of sex reversal are expected to occur if mutations disrupt one of the three steps of gonadal differentiation: formation of the gonadal primordia,
G. Camerino +3 more
openaire +3 more sources
Forensic Science, Medicine and Pathology, 2006
Determing the sex of a give DNA sample can provide criminal investigators with useful intelligence and can aid the identification of missing persons and disaster victims. Polymerase chain reaction-based systems that amplify regions of the am elogenin gene have become the method of choice for sex determination of biological samples.
openaire +2 more sources
Determing the sex of a give DNA sample can provide criminal investigators with useful intelligence and can aid the identification of missing persons and disaster victims. Polymerase chain reaction-based systems that amplify regions of the am elogenin gene have become the method of choice for sex determination of biological samples.
openaire +2 more sources
Human Molecular Genetics, 1994
The cloning of the 'testis determining gene', SRY, promised a revolution in the understanding of sex determination in humans. The failure to isolate further genes involved in sex determination has been a disappointment. The biology of SRY, however, has kept the field exciting. The discoveries of sex reversing SRY mutations with variable penetrance, but
openaire +2 more sources
The cloning of the 'testis determining gene', SRY, promised a revolution in the understanding of sex determination in humans. The failure to isolate further genes involved in sex determination has been a disappointment. The biology of SRY, however, has kept the field exciting. The discoveries of sex reversing SRY mutations with variable penetrance, but
openaire +2 more sources
Sex chromosomes and sex determination in reptiles
Current Opinion in Genetics & Development, 2005Reptiles occupy a crucial position with respect to vertebrate phylogeny, having roamed the earth for more than 300 million years and given rise to both birds and mammals. To date, this group has been largely ignored by contemporary genomics technologies, although the green anole lizard was recently recommended for whole genome sequencing.
William S, Modi, David, Crews
openaire +2 more sources
Sex Chromosomes and Sex Determination in Lepidoptera
Sexual Development, 2007The speciose insect order Lepidoptera (moths and butterflies) and their closest relatives, Trichoptera (caddis flies), share a female-heterogametic sex chromosome system. Originally a Z/ZZ (female/male) system, it evolved by chromosome rearrangement to a WZ/ZZ (female/male) system in the most species-rich branch of Lepidoptera, a monophyletic group ...
W, Traut, K, Sahara, F, Marec
openaire +2 more sources
Determination and stability of sex
BioEssays, 2006AbstractHow is the embryonic bipotential gonad regulated to produce either an ovary or a testis? In males, transient early activation of the Y chromosome Sry gene makes both germ cells and soma male. However, in females, available evidence suggests that the process of ovary sex determination may take place independently in the germline and somatic ...
Ottolenghi C +6 more
openaire +5 more sources
Sex Determination: Turning on sex
Current Biology, 1994The orphan nuclear receptor, steroidogenic factor 1, is central to the differentiation of male and female mammalian gonads. It controls the fate of the initially bipotential gonad as well as later male-specific functions.
openaire +2 more sources