Results 251 to 260 of about 3,243,207 (303)

Preselective Sex Determination

open access: yes, 1978
Vear, Cedric C.
core  

Amphibian sex determination and sex reversal

Cellular and Molecular Life Sciences, 1999
Amphibians employ a genetic mechanism of sex determination, according to all available information on sex chromosomes or breeding tests. Sex reversal allows breeding tests to establish which sex is heterogametic and provides an indication of the mechanism of sex determination. Cases of spontaneous and experimental sex reversal (by temperature, hormones
B M N Wallace
exaly   +3 more sources

Sex Determination and Differentiation

open access: yesNew England Journal of Medicine, 2004
This review elucidates the molecular mechanisms of sex determination and sex differentiation with examples from embryology, animal models, and clinical syndromes. Sex reversal, defective masculinization, pseudohermaphroditism, and syndromes involving the gonads and other organs are some of the clinical problems discussed.
David T, MacLaughlin   +1 more
openaire   +3 more sources

Sex Determination in the Hymenoptera

Annual Review of Entomology, 2008
The 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

Sex determination in papaya

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.
Qingyi Yu, Ray Ming, Paul H Moore
exaly   +3 more sources

Transitions in sex determination and sex chromosomes across vertebrate species [PDF]

open access: yesMolecular 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 ...
Judith E. Mank   +2 more
exaly   +3 more sources

Sex determination and sex reversal

Current Opinion in Genetics & Development, 2006
Sex 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

Sex Determination

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

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