DIFFERENTIAL GENE RESPONSE TO MUTAGENS IN
... nature of both mutagen and gene locus. The evidence for this selective mutagenicity became abundantly clear with the introduction of microorganisms (bacteria and the lower fungi) in the study of mutagenesis. The ease with which large populations of these organisms can be cultured, treated, and subse ...
... nature of both mutagen and gene locus. The evidence for this selective mutagenicity became abundantly clear with the introduction of microorganisms (bacteria and the lower fungi) in the study of mutagenesis. The ease with which large populations of these organisms can be cultured, treated, and subse ...
THE GENETICS OF CURLY WING IN DROSOPHILA. ANOTHER
... to be present in half of the F1 males which all show the above six recessive first-chromosome characters.Curlythereforeexhibitscompleteindependence of the first or X chromosome (see table 7). If the gene for curly were located in the third chromosome, it would be found to show linkage with other gen ...
... to be present in half of the F1 males which all show the above six recessive first-chromosome characters.Curlythereforeexhibitscompleteindependence of the first or X chromosome (see table 7). If the gene for curly were located in the third chromosome, it would be found to show linkage with other gen ...
Age-related macular degeneration: a perspective on genetic studies
... pathogenesis of AMD. Many investigators have proposed that inherited macular dystrophies could be potential models for AMD. Once positional loci and function of the various genes from some of these inherited macular diseases were confirmed, more specific analysis was performed on AMD patients. Table ...
... pathogenesis of AMD. Many investigators have proposed that inherited macular dystrophies could be potential models for AMD. Once positional loci and function of the various genes from some of these inherited macular diseases were confirmed, more specific analysis was performed on AMD patients. Table ...
Common Quantitative Trait Loci for Alcohol
... significant QTL in a large panel of F2 mice derived from the ISS and ILS inbred strains (Markel et al., 1996). One of the highly significant QTL was for the marker, D2MIT21, located at 80 cM on chromosome 2 (Markel et al., 1996), a locus linked to the region containing the high-affinity NT receptor ...
... significant QTL in a large panel of F2 mice derived from the ISS and ILS inbred strains (Markel et al., 1996). One of the highly significant QTL was for the marker, D2MIT21, located at 80 cM on chromosome 2 (Markel et al., 1996), a locus linked to the region containing the high-affinity NT receptor ...
ANIMAL GENETICS
... the value of selection, demonstrating that this is not a germinally creative or additive process as the breeder so often believes, but rather is one of sorting out from among a mixture of heritable characters already present in the stock. The geneticist has gained a considerable knowledge of the mec ...
... the value of selection, demonstrating that this is not a germinally creative or additive process as the breeder so often believes, but rather is one of sorting out from among a mixture of heritable characters already present in the stock. The geneticist has gained a considerable knowledge of the mec ...
Meiosis: Chapter 10 - University at Buffalo
... of white blood cells that are used to distinguish one’s own cells from foreign cells, called HLA, for human leukocyte antigen. ...
... of white blood cells that are used to distinguish one’s own cells from foreign cells, called HLA, for human leukocyte antigen. ...
Genetic characterizations of three male-steriles in wheat, Triticum aestivum L.
... The influence of background genotype on the Chancellor male sterility was attributed to a superior gene(s) in the parental cultivars. Monosomic analyses of the three male sterile sources suggested complex inheritance. The male-sterile expression in Siete Cerros may be due to aneuploidy or gamete let ...
... The influence of background genotype on the Chancellor male sterility was attributed to a superior gene(s) in the parental cultivars. Monosomic analyses of the three male sterile sources suggested complex inheritance. The male-sterile expression in Siete Cerros may be due to aneuploidy or gamete let ...
SelectedJournalAsthm..
... A genome-wide search for asthma susceptibility loci in ethnically diverse populations. The Collaborative Study on the Genetics of Asthma (CSGA). Nat Genet 1997;15:389-92. Daniels SE, Bhattacharrya S, James A, et al. A genome-wide search for quantitative trait loci underlying asthma. Nature 1996;383: ...
... A genome-wide search for asthma susceptibility loci in ethnically diverse populations. The Collaborative Study on the Genetics of Asthma (CSGA). Nat Genet 1997;15:389-92. Daniels SE, Bhattacharrya S, James A, et al. A genome-wide search for quantitative trait loci underlying asthma. Nature 1996;383: ...
Chapter 1
... What Are Genes? • The units of hereditary information – short segments composed of DNA – that act as blueprints for cells to reproduce themselves and manufacture the proteins that maintain life. ...
... What Are Genes? • The units of hereditary information – short segments composed of DNA – that act as blueprints for cells to reproduce themselves and manufacture the proteins that maintain life. ...
Barbara McClintock (1902-1992) - The Embryo Project Encyclopedia
... studied the effects on maize of radiation [13], which could cause the chromosomes to break apart during cell division. When the chromosomes reattached after breaking, they often had mutations. McClintock then used these mutated strains of maize in her experiments to study the effects of genetic vari ...
... studied the effects on maize of radiation [13], which could cause the chromosomes to break apart during cell division. When the chromosomes reattached after breaking, they often had mutations. McClintock then used these mutated strains of maize in her experiments to study the effects of genetic vari ...
Revisiting the Impact of Inversions in Evolution
... generate low recombination rates among the standard (noninverted) and inverted arrangements, they facilitate the spread of the coadapted alleles. Inversions carrying favorable alleles then spread to fixation unless there is migration or counteracting selection to prevent fixation. An alternative hypot ...
... generate low recombination rates among the standard (noninverted) and inverted arrangements, they facilitate the spread of the coadapted alleles. Inversions carrying favorable alleles then spread to fixation unless there is migration or counteracting selection to prevent fixation. An alternative hypot ...
rec-mediated recombinational hot spot activity in bacteriophage
... (1969) ;the extent of the b1319 and b1453 deletions is determined from the following evidence: b1319 and b1453 are missing 12% and 11% of the X DNA content, respectively, as judged from the intrinsic density of phage particles; both test as Spi-, Fec-, and int-; in addition, 1319 is apparently cZZZ- ...
... (1969) ;the extent of the b1319 and b1453 deletions is determined from the following evidence: b1319 and b1453 are missing 12% and 11% of the X DNA content, respectively, as judged from the intrinsic density of phage particles; both test as Spi-, Fec-, and int-; in addition, 1319 is apparently cZZZ- ...
Biology A Chapter 10
... 1. When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs. a. crossing over c. hybridization b. mutagenesis d. fertilization 2. Crossing over results in a _____. a. female genotype c. genetic recombination b. male genotype d. phenoty ...
... 1. When an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosome, _____ occurs. a. crossing over c. hybridization b. mutagenesis d. fertilization 2. Crossing over results in a _____. a. female genotype c. genetic recombination b. male genotype d. phenoty ...
clinical dilemmas and surgical treatment of penoscrotal, scrotal and
... some Y considered responsible for the spermatogenesis. At the short arm of the chromosomes X and Y there are homologous sites that approach each other during the zygonema of the myosis. This means that the genetic material is exchanged between X and Y chromosomes during the cross-over process. Since ...
... some Y considered responsible for the spermatogenesis. At the short arm of the chromosomes X and Y there are homologous sites that approach each other during the zygonema of the myosis. This means that the genetic material is exchanged between X and Y chromosomes during the cross-over process. Since ...
Complex regulation of sister kinetochore orientation in meiosis-I
... Homologs: Two copies of each chromosome present in a diploid cell. Spindle: The microtubular organelle that helps chromosome segregation during cell division. Spindle formation is initiated in S phase with the duplication of the spindle pole body (spb). The SPB later defines the two poles of the spin ...
... Homologs: Two copies of each chromosome present in a diploid cell. Spindle: The microtubular organelle that helps chromosome segregation during cell division. Spindle formation is initiated in S phase with the duplication of the spindle pole body (spb). The SPB later defines the two poles of the spin ...
genetics - Liceocopernico.it
... Example I.I. Healthy people have a gene that specifies the normal protein structure of the red blood cell pigment called hemoglobin. Some anemic individuals have an altered form of this gene, i.e., an allele, which makes a defective hemoglobin protein unable to carry the normal amount of oxygen to t ...
... Example I.I. Healthy people have a gene that specifies the normal protein structure of the red blood cell pigment called hemoglobin. Some anemic individuals have an altered form of this gene, i.e., an allele, which makes a defective hemoglobin protein unable to carry the normal amount of oxygen to t ...
genetic variability, twin hybrids and constant hybrids, in a case of
... The present work will for the most part be described in its original sequence, as this mode of presentation will probably provide the reader with the best working knowledge both of the way the phenomena in question interfere with “regular” Mendelian results, and of the genetic methods used to unrave ...
... The present work will for the most part be described in its original sequence, as this mode of presentation will probably provide the reader with the best working knowledge both of the way the phenomena in question interfere with “regular” Mendelian results, and of the genetic methods used to unrave ...
twin studies - Institute for Behavioral Genetics
... What is dyslexia? A standard answer would be something like “dyslexia is a specific, significant impairment in reading ability that is not explained by deficits in general intelligence, opportunity, motivation or sensory acuity”. The deceptive simplicity of this definition breaks down as soon as one ...
... What is dyslexia? A standard answer would be something like “dyslexia is a specific, significant impairment in reading ability that is not explained by deficits in general intelligence, opportunity, motivation or sensory acuity”. The deceptive simplicity of this definition breaks down as soon as one ...
Genetic balancers
... A drawback of these methods is that they are not easily adapted for the isolation of large numbers of lethal mutations over large genetic regions. They may require many different sets of appropriate marker mutations, which either may be too difficult to score or may not exist. A more sophisticated a ...
... A drawback of these methods is that they are not easily adapted for the isolation of large numbers of lethal mutations over large genetic regions. They may require many different sets of appropriate marker mutations, which either may be too difficult to score or may not exist. A more sophisticated a ...
www.psd150.org
... The yellow parent peas must be heterozygous. The yellow phenotype is expressed. Through meiosis and fertilisation, some offspring peas are homozygous recessive – they express a green colour. ...
... The yellow parent peas must be heterozygous. The yellow phenotype is expressed. Through meiosis and fertilisation, some offspring peas are homozygous recessive – they express a green colour. ...
Lethal Mutations and Balanced Lethal Systems in
... assumption that the frequency of lethals is the same for all chromosomes-an assumption unlikely to be fully justified-the lethal frequency for the whole genome was between 24 yoand 32 %. This agrees well with the 25 yo found by Kafer & Chen (1964) under similar conditions. Despite an intensive inves ...
... assumption that the frequency of lethals is the same for all chromosomes-an assumption unlikely to be fully justified-the lethal frequency for the whole genome was between 24 yoand 32 %. This agrees well with the 25 yo found by Kafer & Chen (1964) under similar conditions. Despite an intensive inves ...
Chromosome location and characterization of genes for grain
... genes from Israel A were also located to chromosomes 2A, 5B, 3A, and 6A (Joppa and Cantrell 1990). Therefore, the genes for high GPC other than the GpcB1 might be present commonly on chromosomes 2A of Israel A and PI 481521 and 5B of all three T. dicoccoides accessions. The high GPC in the LDN(IsA5B ...
... genes from Israel A were also located to chromosomes 2A, 5B, 3A, and 6A (Joppa and Cantrell 1990). Therefore, the genes for high GPC other than the GpcB1 might be present commonly on chromosomes 2A of Israel A and PI 481521 and 5B of all three T. dicoccoides accessions. The high GPC in the LDN(IsA5B ...
- Wiley Online Library
... process called mitosis. During gametogenesis, two successive rounds of chromosome segregation following only a single round of DNA replication produce cells with only a single set of chromosomes (haploids) from cells initially bearing two copies (diploids). These specialized divisions are called mei ...
... process called mitosis. During gametogenesis, two successive rounds of chromosome segregation following only a single round of DNA replication produce cells with only a single set of chromosomes (haploids) from cells initially bearing two copies (diploids). These specialized divisions are called mei ...
Genome-wide analysis by SNP Array
... indicates a heterozygous genotype (AB), whereas 0 and 1 indicates a homo-zygous genotype (AA, BB, respectively). In the case of a deletion, present in all cells, the deleted region will show homozygositybands at 0 and 1 (AA, BB genotypes) and loss of the BAF value at 0,5 (Loss of AB heterozygous gen ...
... indicates a heterozygous genotype (AB), whereas 0 and 1 indicates a homo-zygous genotype (AA, BB, respectively). In the case of a deletion, present in all cells, the deleted region will show homozygositybands at 0 and 1 (AA, BB genotypes) and loss of the BAF value at 0,5 (Loss of AB heterozygous gen ...
Y chromosome
The Y chromosome is one of two sex chromosomes (allosomes) in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development. The DNA in the human Y chromosome is composed of about 59 million base pairs. The Y chromosome is passed only from father to son. With a 30% difference between humans and chimpanzees, the Y chromosome is one of the fastest evolving parts of the human genome. To date, over 200 Y-linked genes have been identified. All Y-linked genes are expressed and (apart from duplicated genes) hemizygous (present on only one chromosome) except in the cases of aneuploidy such as XYY syndrome or XXYY syndrome. (See Y linkage.)