Results 81 to 90 of about 8,207 (204)

Meiotic nondisjunction of chromosomes 1, 17, 18, X, and Y in men more than 80 years of age

, 2000
In order to evaluate a possible paternal age effect, testicular sperm cells from three men aged 81, 82, and 83 yr were analyzed by two-color- and three-color-fluorescence in situ hybridization for disomy rates of chromosomes 1, 17, 18, X, and Y as well ...
Guttenbach, M., Engel, Wolfgang, Kohn, F. M., Schmid, M.   +3 more
core   +1 more source

Nuclear DNA Content of Fine Needle Aspirates of Invasive Ductal Carcinomas of the Breast

Analytical Cellular Pathology, 1997
Patients with aggressive breast cancers benefit from chemotherapy prior to surgery. If the biology of the breast cancers were better characterised pre‐operatively, more patients at risk could be offered chemotherapy.
Sudip Sarker, Allan Spigelman, Marjorie Walker, Dulcie Coleman   +3 more
doaj   +1 more source

Early Discrimination of Maternal Haploid and Diploid Maize (Zea mays L.) Seedlings Using Morphological Traits and Random Forest Classifier

Plant Breeding, Volume 145, Issue 4, Page 822-833, August 2026.
ABSTRACT Doubled haploid (DH) technology has been widely adopted in maize (Zea mays L.) breeding programs due to its ability to reduce breeding cycle time and optimize costs. Early ploidy identification is essential for maximizing the efficiency of DH production, particularly prior to chromosome doubling.
Mariana Martins Marcondes, Matheus Lucas Schuck, Victor Hugo Garcia, Robson Marcelo Rossi, Vanderlei Aparecido de Lima, Rodrigo Gomes, Carlos Alberto Scapim, Marcos Ventura Faria   +7 more
wiley   +1 more source

CHROMOSOME NUMBERS OF CHILEAN PTERIDOPHYTES: FIRST CONTRIBUTION NUMEROS CROMOSOMICOS DE PTERIDOFITOS CHILENOS: PRIMERA CONTRIBUCION

Gayana: Botanica, 2006
Mitotic chromosome counts in Chilean pteridophytes confirm the diploidy described for Equisetum L. (2n = 216) and Blechnum L. (2n = 66), as well as the tetraploidy of Asplenium L. (2n = 144). Megalastrum spectabile (Kaulf.) A.R.Sm.
Pedro Jara-Seguel, Mario Romero-Mieres, Claudio Palma-Rojas   +2 more
doaj  

Structure of 5S rDNA sequence of the gibel carp (Carassius gibelio) with 2n=100 chromosomes

Frontiers in Marine Science, 2015
In vertebrate, the 5S ribosomal DNA (rDNA) consists of a conserved coding (transcriptional) unit of 120 bp (5S), which is separated from the next unit by a nontranscribed spacer (NTS). The coding sequence and the NTS together form a repeat unit which can
Lech Kirtiklis
doaj   +1 more source

A computational model of evolution: Haploidy versus diploidy

, 2012
In this paper, the study of diploidy is introduced like and important mechanism for memory reinforcement in artificial environments where adaptation is very important.
Berlanda, A., Sanchis, A., Molina, J., Isasi, P.   +3 more
core  

On the Design of Diploid Genetic Algorithms for Problem Optimization in Dynamic Environments

, 2006
Using diploidy and dominance is one method to enhance the performance of genetic algorithms in dynamic environments. For diploidy genetic algorithms, there are two key design factors: the cardinality of genotypic alleles and the uncertainty in the ...
Shengxiang Yang (7582940)
core   +2 more sources

High susceptibility for diploidy in ovulated oocytes from XO mice

Adult female mice of the "sensitive" NMRI/Han strain ovulate diploid oocytes after gonadotropin treatment. Other mouse strains are "non-sensitive" with respect to the ovulation of such diploid oocytes.
Hansmann, I., Franke, U., Beermann, F.
core   +1 more source

Diploid Male Production of Two Amazonian Melipona Bees (Hymenoptera: Apidae)

Psyche: A Journal of Entomology, 2012
The diploid male has already been recorded for Melipona Illger, and herein, in Melipona seminigra merrillae Cockerell and Melipona interrupta manaosensis Schwarz.
Izaura Bezerra Francini, Carlos Gustavo Nunes-Silva, Gislene Almeida Carvalho-Zilse   +2 more
doaj   +1 more source

Tumor ploidy determination in low-pass whole genome sequencing and allelic copy number visualization using the Constellation Plot

Genome Biology
Ploidy determination across the genome has been challenging for low-pass-WGS tumor-only samples. We present BACDAC, a method that calculates tumor ploidy down to 1.2X effective tumor coverage.
Sarah H. Johnson, James B. Smadbeck, Roman M. Zenka, Michael T. Barrett, Athanasios Gaitatzes, Arnav Solanki, Angela B. Florio, Mitesh J. Borad, John C. Cheville, George Vasmatzis   +9 more
doaj   +1 more source