The term genotype refers to the genetic structure of a cell, an organism, or an individual. A common application of this term is in the case of the specific allele makeup of the individual, usually with the reference to a specific characteristic taken under consideration. In the human CFTR gene, which is responsible for encoding a protein that transports chloride ions across the cell membranes can be dominant (which means that it is the normal version of the gene) or recessive (which means that it is the mutated version of the gene). Individuals that have two recessive alleles of the human CFTR gene will be diagnosed with cystic fibrosis.
Genotype is closely related to the genomic sequence, but there are subtle differences between the two. The term genomic sequence refers to the absolute measure of base composition of an individual, or a representative of a specific species or group. The term genotype, on the other hand, refers to the measurement of an individual organism differs within a group of other individuals or a species.
The difference between genotype and phenotype is often encountered in the study of family patterns for particular hereditary diseases or conditions, such as in the case of hemophilia. There are two alleles for any given genes, especially in humans and most animals. These alleles can be of the same variety (homozygous) or of different ones (heterozygous) depending on the individual of interest. With a dominant allele, the offspring can be expected to inherit the trait in question, regardless of the second allele. In the case of a recessive allele, such as in the case of albinism, the phenotype depends on the other allele.
This category contains scientific information on genotype, the genetic structure of a cell, an organism, or an individual.
Wilcox J.R., 1986: Pollinator density effects on frequency and randomness of male sterile soybean glycine max pollinations. Crop Science: 96-99 Genetic male-sterility has been used to facilitate intermating in the recombination phase of soybean breeding programs. Insect vectors of pollen do not move at random in these intermating blocks and this may restrict random pollination. [...]
Duke C.E., 1979: Plasma concentrations of prolactin during the reproductive cycle of the domestic turkey meleagris gallopavo. Poultry Science: 963-970 Plasma concentrations of prolactin were measured by a heterologous double antibody radioimmunoassay during the reproductive cycle of Large White turkey hens. In all hens, there was a large increase in the plasma concentration of Prl [...]
Boe A.A., 1986: Plant regeneration in callus cultures derived from young inflorescences of little bluestem schizachyrium scoparium. Crop Science: 827-829 Little Bluestem, a warm-season perennial grass, is valuable for range and conservation plantings in the Great Plains. The objectives of this study were to develop rapid vegetative propagation techniques to facilitate selection of superior genotypes [...]
Thomas T.A., 1981: Phytate and total phosphorus content of field beans vicia faba. Journal Of The Science Of Food & Agriculture: 187-192 Considerable variation was found in the phytate and total P contents of varieties, selections and genotypes of field beans (faba L.) The phytate P content of seeds taken from single plants of the [...]
Deshmukh A.K., 1987: Photomorphogenic effect of crowding on growth and dry matter production of crops. Indian Journal Of Agricultural Sciences: 112-116 Daily 5-min exposure to the basal parts of ‘Vitthal’ maize (Zea mays Linn.) ‘nct 19′ and ‘Nimbkar 1′ upland cotton (Gossyplium hirsutum Linn.) and ‘Oro’ sesamum (Sesamum Indicum Linn.) to end-of-day light having a [...]
Kandalkar V.S., 1983: Phenotypic stability of seed yield and its components in fodder cowpea vigna unguiculata. Indian Journal Of Genetics & Plant Breeding: 164-167 Ten varieties of forage cowpea were evaluated for stability parameters with respect to seed yield and its components in 8 environments. The varieties included were Fos 1, Hfc 42-1, Gfc 2, [...]
Pieragostini, E.; Giorgi, G.; Pezzoli, C.; Cavicchi, S., 1984: Perturbation of a gene pool dynamics of alcohol dehydrogenase system and 5 metric traits in differently introgressed populations of drosophila melanogaster. Genetica (Dordrecht) 63(2): 139-146 The possibilities of restoring in a perturbed genome the genetic situation existing before the perturbation are discussed. A continuous flow of [...]
Thai K.M., 1987: Patterns of changes of dormant genotypes in avena fatua populations under different agricultural conditions. Canadian Journal Of Botany: 1741-1745 Experimental evidence is provided to support earlier suggestions that summer-fallowing of cropland enhances the relative abundance of dormant wild oats at the expense of nondormant ones. Two heterogeneous populations of wild oats, Avena [...]
Hammons R.O., 1985: Pattern analysis of genotype adaptation and genotype x environment interactions in the uniform peanut arachis hypogaea. Peanut Science: 35-41 Genotype.times. environment (g.times. e) interactions can confound comparisons among panut (Arachis hypogaea L.) genotypes in multi-environment genotype trials. Herein g.times. e interactions in two data sets constructed from the Uniform Peanut Performance Tests [...]
Wolfe M.S., 1980: Pathogen response to host resistance and its implication in breeding programs. Bulletin Oepp: 341-348 Extensive field trials using barley variety mixtures were carried out; the evolution of powdery mildew was followed. Assessments were of the relative frequencies of powdery mildew genotypes carrying 1, 2 or 3 virulence factors. The results of this [...]