Results 51 to 60 of about 2,299,084 (348)

How to identify sex chromosomes and their turnover

open access: yesMolecular Ecology, 2019
Although sex is a fundamental component of eukaryotic reproduction, the genetic systems that control sex determination are highly variable. In many organisms the presence of sex chromosomes is associated with female or male development.
Daniela H. Palmer   +3 more
semanticscholar   +1 more source

Comparative analysis of sex chromosomes in Leporinus species (Teleostei, Characiformes) using chromosome painting. [PDF]

open access: yes, 2013
BACKGROUND: The Leporinus genus, belonging to the Anostomidae family, is an interesting model for studies of sex chromosome evolution in fish, particularly because of the presence of heteromorphic sex chromosomes only in some species of the genus.
da Silva, Edson Lourenço   +6 more
core   +3 more sources

Young sex chromosomes in plants and animals.

open access: yesNew Phytologist, 2019
A major reason for studying plant sex chromosomes is that they may often be "young" systems. There is considerable evidence for the independent evolution of separate sexes within plant families or genera, in some cases showing that the maximum possible ...
D. Charlesworth
semanticscholar   +1 more source

Genetic and cytological analyses reveal the recombination landscape of a partially differentiated plant sex chromosome in kiwifruit

open access: yesBMC Plant Biology, 2019
Background Angiosperm sex chromosomes, where present, are generally recently evolved. The key step in initiating the development of sex chromosomes from autosomes is the establishment of a sex-determining locus within a region of non-recombination.
S. M. Pilkington   +13 more
doaj   +1 more source

Karyological Characterization of the Endemic Iberian Rock Lizard, Iberolacerta Monticola (Squamata, Lacertidae): Insights into Sex Chromosome Evolution [PDF]

open access: yes, 2013
[Abstract] Rock lizards of the genus Iberolacerta constitute a promising model to examine the process of sex chromosome evolution, as these closely related taxa exhibit remarkable diversity in the degree of sex chromosome differentiation with no clear ...
Caputo Barucchi, Vincenzo   +8 more
core   +2 more sources

Genetic Diversity on the Sex Chromosomes

open access: yesGenome Biology and Evolution, 2018
Levels and patterns of genetic diversity can provide insights into a population’s history. In species with sex chromosomes, differences between genomic regions with unique inheritance patterns can be used to distinguish between different sets of possible
Melissa A. Wilson Sayres
semanticscholar   +1 more source

Turtles of the genera Geoemyda and Pangshura (Testudines: Geoemydidae) lack differentiated sex chromosomes: the end of a 40-year error cascade for Pangshura [PDF]

open access: yesPeerJ, 2019
For a long time, turtles of the family Geoemydidae have been considered exceptional because representatives of this family were thought to possess a wide variety of sex determination systems.
Sofia Mazzoleni   +9 more
doaj   +2 more sources

The Discovery of XY Sex Chromosomes in a \u3cem\u3eBoa\u3c/em\u3e and \u3cem\u3ePython\u3c/em\u3e [PDF]

open access: yes, 2017
For over 50 years, biologists have accepted that all extant snakes share the same ZW sex chromosomes derived from a common ancestor [1, 2, 3], with different species exhibiting sex chromosomes at varying stages of differentiation.
Banks, Jason L.   +7 more
core   +1 more source

Extending long-range phasing and haplotype library imputation methods to impute genotypes on sex chromosomes [PDF]

open access: yes, 2013
AlphaImpute is a flexible and accurate genotype imputation tool that was originally designed for the imputation of genotypes on autosomal chromosomes. In some species, sex chromosomes comprise a large portion of the genome.
Hickey, John M., Kranis, Andreas
core   +1 more source

Plasmodium falciparum gametogenesis essential protein 1 (GEP1) is a transmission‐blocking target

open access: yesFEBS Letters, EarlyView.
This study shows Plasmodium falciparum GEP1 is vital for activating sexual stages of malarial parasites even independently of a mosquito factor. Knockout parasites completely fail gamete formation even when a phosphodiesterase inhibitor is added. Two single‐nucleotide polymorphisms (V241L and S263P) are found in 12%–20% of field samples.
Frederik Huppertz   +5 more
wiley   +1 more source

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