Results 41 to 50 of about 13,896 (236)

Pollen heteromorphism in Schleichera Lour. (Sapindaceae), observed in surface soil samples from central India

open access: yesActa Palaeobotanica, 2021
Angiosperms display striking variation of pollen morphological features within and between populations of the same species, as well as within individual plants.
Md. Firoze Quamar   +3 more
doaj   +1 more source

Applications of Genome Editing Technology in Research on Chromosome Aneuploidy Disorders

open access: yesCells, 2020
Chromosomal segregation errors in germ cells and early embryonic development underlie aneuploidies, which are numerical chromosomal abnormalities causing fetal absorption, developmental anomalies, and carcinogenesis.
Silvia Natsuko Akutsu   +4 more
doaj   +1 more source

Adaptation to high ethanol reveals complex evolutionary pathways [PDF]

open access: yes, 2015
Tolerance to high levels of ethanol is an ecologically and industrially relevant phenotype of microbes, but the molecular mechanisms underlying this complex trait remain largely unknown.
Arslan, Ahmed   +15 more
core   +4 more sources

A single mutation results in diploid gamete formation and parthenogenesis in a Drosophila yemanuclein-alpha meiosis I defective mutant

open access: yesBMC Genetics, 2010
Background Sexual reproduction relies on two key events: formation of cells with a haploid genome (the gametes) and restoration of diploidy after fertilization.
Capri Michèle   +4 more
doaj   +1 more source

Mitotic recombination accelerates adaptation in the fungus Aspergillus nidulans. [PDF]

open access: yesPLoS Genetics, 2007
Understanding the prevalence of sexual reproduction in eukaryotes is a hard problem. At least two aspects still defy a fully satisfactory explanation, the functional significance of genetic recombination and the great variation among taxa in the relative
Sijmen E Schoustra   +3 more
doaj   +1 more source

Purkinje Cardiomyocytes of the Adult Ventricular Conduction System Are Highly Diploid but Not Uniquely Regenerative

open access: yesJournal of Cardiovascular Development and Disease, 2023
Adult hearts are characterized by inefficient regeneration after injury, thus, the features that support or prevent cardiomyocyte (CM) proliferation are important to clarify.
Hirofumi Watanabe   +9 more
doaj   +1 more source

Recombination and the evolution of diploidy. [PDF]

open access: yesGenetics, 1992
Abstract With two copies of every gene, a diploid organism is able to mask recessive deleterious mutations. In this paper we present the analysis of a two-locus model designed to determine when the masking of deleterious alleles favors the evolution of a dominant diploid phase in organisms that alternate between haploid and diploid ...
S P, Otto, D B, Goldstein
openaire   +2 more sources

Viable Triploid Honey Bees (Apis mellifera capensis) Are Reliably Produced in the Progeny of CO2 Narcotised Queens

open access: yesG3: Genes, Genomes, Genetics, 2018
The haplodiploid system of sex determination of Hymenoptera acts as an exaptation for species to evolve novel forms of asexual reproduction including thelytoky (clonal offspring of the mother). During normal reproduction in Hymenoptera, three of the four
Benjamin P. Oldroyd   +7 more
doaj   +1 more source

A clonal legacy? Reproductive mode variation in hard‐ and soft‐bottom Gracilaria vermiculophylla populations

open access: yesJournal of Phycology, EarlyView.
Abstract The invasion of the red macroalga Gracilaria vermiculophylla provided an opportunity to investigate the influence of benthic habitats on the reproductive mode, population structure, and colonization dynamics in haploid‐diploid life cycles.
Alexis P. Oetterer   +3 more
wiley   +1 more source

Parthenocarpy and Self-Incompatibility in Mandarins

open access: yesAgronomy, 2021
Citrus reproductive biology is complex. One of its characteristic features is parthenocarpy that enables seedless fruit production. Citrus parthenocarpy and self-incompatibility knowledge is only partial and sometimes discrepant.
Rafael Montalt   +4 more
doaj   +1 more source

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