Results 261 to 270 of about 371,220 (313)

SEX DIFFERENTIATION BY LEUKOCYTE MORPHOLOGY

The Journal of Clinical Endocrinology & Metabolism, 1956
Following the observations of Barr and Bertram in 1949 (1) on the neurones of cats, several workers have shown that the sex of certain mammals can be clearly identified from the microscopic appearance of the cells of various tissues (2–7). Graham (8) showed that in the embryo this specificity antedates sexual differentiation of the gonads.
D K, BRIGGS, H S, KUPPERMAN
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Molecular Aspects of Sex Differentiation

Current Molecular Medicine, 2002
Mammalian sex differentiation involves the action of a cascade of genes. Discovery of the sex-determining region of the Y chromosome (SRY) marked the beginning of the delineation of the genes in the cascade. Studies of the genetics of mammalian sex reversal and the embryogenesis of the mice are essential in this endeavor.
Wai-Yee, Chan, Owen M, Rennert
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The mechanism of phenotypic sex differentiation

Arthritis & Rheumatism, 1979
AbstractFor the first 2 months of gestation, there is no difference in the development of male and female embryos. Gonadal differentiation then ensues, and the ovary and testis commence to synthesize their characteristic hormones at approximately the same time.
J D, Wilson, J E, Griffin, F W, George
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Molecular Endocrinology of Sex Differentiation

Seminars in Reproductive Medicine, 2002
Differentiation of a testis or an ovary from a bipotential gonad is a complex developmental process involving various genes and hormones. Similarly, internal and external genital organs develop from an indeterminate stage from the complex differentiation of Wolffian and Müllerian ducts.
Garry L, Warne, Shankar, Kanumakala
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Unisexual Cucumber Flowers, Sex and Sex Differentiation

2013
Sex is a universal phenomenon in the world of eukaryotes. Attempts have been made to understand regulatory mechanisms for plant sex determination by investigating unisexual flowers. The cucumber plant is one of the model systems for studying how sex determination is regulated by phytohormones.
Shu-Nong, Bai, Zhi-Hong, Xu
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Sex Differentials in Health and Mortality

Women & Health, 1987
It is common knowledge that females tend to live longer than males. In the United States and most other countries, female death rates are lower than male rates for all age groups and most important causes of death. But while they are alive, females' health seems to be worse than males'.
Lois M. Verbrugge, Deborah L. Wingard, Haworth Continuing Features Submission   +2 more
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SEX DETERMINATION AND SEX DIFFERENTIATION IN MALARIA PARASITES

Biological Reviews, 1988
Summary1. The most coherent body of information on the malarial life‐cycles comes from studies on P. berghei and P. falciparum. For both species there is an extensive and accurate description of the life‐cycle available based on synchronized in‐vitro and in‐vivo infections (the latter only for P. berghei).2. The trophozoites preceding the young gamonts
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Genetic mechanisms of sex differentiation

Current Opinion in Pediatrics, 1996
Cloning of the SRY sex-determining locus on the Y chromosome has stimulated research on the genetic mechanisms of sex determination. It now appears that SRY is not the only gene required for testicular differentiation; X-linked and autosomal genes are also important.
N, Josso, R, Rey
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Genetic Disorders of Sex Differentiation

2011
Disorders of sex development (DSD) constitute a large array of disorders that affect the genito-urinary tract and often include the endocrine system [25]. 46,XY DSD includes 46,XY complete or partial gonadal dysgenesis and undervirilization or undermasculinization of an XY male due to defects in androgen synthesis or action.
Ken, McElreavey, Anu, Bashamboo
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[Sex determination and sex differentiation].

Die Naturwissenschaften, 1981
Sex determination in mammals proceeds like a cascade from the level of the sex chromosomes to the gonads, to the genital ducts, and finally to the expression of the male or female phenotype. At the level of the genital ducts male sex organs are induced by testosterone. Its action depends on an intact cytoplasmic androgen receptor protein.
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