Results 251 to 260 of about 2,151,922 (308)

Non-canonical sex chromosome evolution revealed by extreme heterogeneity in homomorphic Y chromosome differentiation in the common frog

open access: yes
Carpentier F   +8 more
europepmc   +1 more source

Dosage compensation and meiotic sex chromosome inactivation are maintained in the absence of selection

open access: yes
Parker DJ   +12 more
europepmc   +1 more source
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Multiple Sex Chromosome Drivers in a Mammal With Three Sex Chromosomes

Current Biology, 2021
Eukaryotes with separate males and females display a great diversity in the way they determine sex, but it is still unclear what evolutionary forces cause transitions between sex-determining systems. Rather that the lack of hypotheses, the problem is the scarcity of adequate biological systems to test them.
Saunders, Paul   +3 more
openaire   +4 more sources

Sex Chromosome Abnormalities

Nature, 1967
DURING the past decade several surveys have related the incidence of sex chromosome abnormalities among the general population with that among mentally deficient patients in hospital1–3. In 1963 Wegmann arid Smith4 carried out a buccal smear survey among a male population composed of juvenile delinquents and felons. They found the incidence of positive
R M, Goodman, W S, Smith, C J, Migeon
openaire   +2 more sources

Sex Chromosome Disorders

New England Journal of Medicine, 1976
The sex chromosome abnormalities are one of the most common types of chromosome disorders, occurring once among every 1100 females and once among every 380 males.
Gerald S Park, P S Gerald
exaly   +3 more sources

Sex Chromosomes and Sex Chromosome Abnormalities

Clinics in Laboratory Medicine, 2011
This article focuses on constitutional sex chromosome abnormalities detected by conventional cytogenetics and fluorescence in situ hybridization. The author discusses the two general classifications of abnormalities: numerical and structural. Also included are descriptions of unique aspects of X and Y chromosomes, technological advances in detection ...
openaire   +2 more sources

Sex Chromosomes in Lizards

Science, 1967
Karyotypes of many species of the genus Sceloporus support the generalization that there are no morphologically recognizable sex chromosomes in lizards; however, there is a marked sexual dimorphism in the karyotypes of Sceloporus jarrovi and Sceloporus poinsettia ...
C J, Cole, C H, Lowe, J W, Wright
openaire   +2 more sources

Plant Sex Chromosomes

Annual Review of Plant Biology, 2008
Although individuals in most flowering plant species, and in many haploid plants, have both sex functions, dioecious species—in which individuals have either male or female functions only—are scattered across many taxonomic groups, and many species have genetic sex determination.
openaire   +3 more sources

Genomics of sex chromosomes

Current Opinion in Plant Biology, 2007
Sex chromosomes in plants and animals are distinctive, not only because of their gender-determining role but also for genomic features that reflect their evolutionary history. The genomic sequences in the ancient sex chromosomes of humans and in the incipient sex chromosomes of medaka, stickleback, papaya, and poplar exhibit unusual features as ...
Ray, Ming, Paul H, Moore
openaire   +2 more sources

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