Results 41 to 50 of about 2,299,084 (348)

Meiotic sex chromosome cohesion and autosomal synapsis are supported by Esco2.

open access: yes, 2020
In mitotic cells, establishment of sister chromatid cohesion requires acetylation of the cohesin subunit SMC3 (acSMC3) by ESCO1 and/or ESCO2. Meiotic cohesin plays additional but poorly understood roles in the formation of chromosome axial elements (AEs)
Biswas, U.   +6 more
core   +1 more source

Recent sex chromosome divergence despite ancient dioecy in the willow Salix viminalis. [PDF]

open access: yes, 2017
Sex chromosomes can evolve when recombination is halted between a pair of chromosomes, and this can lead to degeneration of the sex-limited chromosome.
Berlin, S.   +4 more
core   +2 more sources

Non-random chromosome positioning in mammalian sperm nuclei, with migration of the sex chromosomes during late spermatogenesis [PDF]

open access: yes, 2005
Chromosomes are highly organized and compartmentalized in cell nuclei. The analysis of their position is a powerful way to monitor genome organization in different cell types and states.
Abeydeera, L   +3 more
core   +1 more source

Mismatches between the genetic and phenotypic sex in the wild Kou population of Nile tilapia Oreochromis niloticus [PDF]

open access: yes, 2019
Sex determination and sex chromosomes can be very diverse between teleost species. The group of tilapias shows a polymorphism in sex determination not only between closely related species but also between domestic strains within a species.
Baroiller, Jean-François   +3 more
core   +1 more source

Conflict on the sex chromosomes: cause, effect, and complexity [PDF]

open access: yes, 2014
Intralocus sexual conflict and intragenomic conflict both affect sex chromosome evolution and can in extreme cases even cause the complete turnover of sex chromosomes.
Hosken, DJ, Mank, JE, Wedell, N
core   +1 more source

Microsatellite distribution on sex chromosomes at different stages of heteromorphism and heterochromatinization in two lizard species (Squamata: Eublepharidae: Coleonyx elegans and Lacertidae: Eremias velox)

open access: yesBMC Genetics, 2011
Background The accumulation of repetitive sequences such as microsatellites during the differentiation of sex chromosomes has not been studied in most squamate reptiles (lizards, amphisbaenians and snakes), a group which has a large diversity of sex ...
Kratochvíl Lukáš   +2 more
doaj   +1 more source

Chromosome mapping of repetitive sequences in Anostomidae species: implications for genomic and sex chromosome evolution

open access: yesMolecular Cytogenetics, 2012
Background Members of the Anostomidae family provide an interesting model system for the study of the influence of repetitive elements on genome composition, mainly because they possess numerous heterochromatic segments and a peculiar system of female ...
da Silva Edson Lourenço   +2 more
doaj   +1 more source

How to make a sex chromosome [PDF]

open access: yes, 2016
Sex chromosomes can evolve once recombination is halted between a homologous pair of chromosomes. Owing to detailed studies using key model systems, we have a nuanced understanding and a rich review literature of what happens to sex chromosomes once ...
A Auton   +113 more
core   +2 more sources

Karyotype and male meiosis in Spartocera batatas and meiotic behaviour of multiple sex chromosomes in Coreidae (Heteroptera)

open access: yesEuropean Journal of Entomology, 2006
The Coreidae (Heteroptera) have holokinetic chromosomes and during male meiosis the autosomal bivalents segregate reductionally at anaphase I while the sex chromosomes do so equationally. The modal diploid chromosome number of the family is 2n = 21, with
María José FRANCO   +2 more
doaj   +1 more source

Avian W and mammalian Y chromosomes convergently retained dosage-sensitive regulators [PDF]

open access: yes, 2017
After birds diverged from mammals, different ancestral autosomes evolved into sex chromosomes in each lineage. In birds, females are ZW and males are ZZ, but in mammals females are XX and males are XY.
A Cockwell   +82 more
core   +2 more sources

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