• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Severe oligozoospermia resulting from deletions
Severe oligozoospermia resulting from deletions

... with this hypothesis. Most importantly, this model implies severe that oligozoospermia, complete testicular maturation arrest, and Sertoli-cell-only syndrome are not aetiologically distinct, at least when associated with Yq deletions, but represent clinically diverse manifestations of the same under ...
Unit 05 - Delivery guide
Unit 05 - Delivery guide

... becoming increasingly clear that most human traits once thought of as demonstrating single gene inheritance, e.g. attached and detached ear lobes, are now known to involve more than one gene, so monohybrid inheritance is perhaps best demonstrated, initially, through the inheritance of a single gene ...
Human Sex Determination
Human Sex Determination

... 28 (Cameron and Sinclair, ’97). A variety of mutations were identified, including: mutations in consensus splice sites, missense and frameshift mutations producing premature stop codons, and amino acid substitutions. All these mutations appear to result in a non-functional SOX9 product. Furthermore, ...
Cloning and Sequencing of a Gene from Bacillus
Cloning and Sequencing of a Gene from Bacillus

... The degree of homology of the DNA from different species of Bacillus has previously been studied by both interspecific transformation and DNA hybridization (Seki et al., 1975, 1979). Interspecific transformation, however, is known to be extremely inefficient (te Riele & Venema, 1982a). There is evid ...
The rapidly evolving field of plant centromeres
The rapidly evolving field of plant centromeres

... rDNA was inserted into CEN3 [17]. Whether such changes generally characterize the evolution of plant centromeres remains to be determined, but their occurrence on three of the five Arabidopsis centromeres warrants further analysis. Furthermore, although Arabidopsis chromosome arms have large tracts ...
Imprinted Genes and Human Disease
Imprinted Genes and Human Disease

... allocation of maternal resources) are prone to evolving imprinted gene expression. However, not all of these diseases are obviously growth related. In some cases, it might be possible to reconcile these disease phenotypes with the more general version of the Kinship Theory. In other cases, these dis ...
A systematic genome-wide analysis of zebrafish protein
A systematic genome-wide analysis of zebrafish protein

... mutation if present in one to three individuals, as this allowed for founder effects that may have arisen from the mutagenesis. If the SNP was present in more than three individuals it was considered to be common to the strain used. Heterozygous calls found in one to three samples only were deemed t ...
A Major Species of Mouse μ-opioid Receptor mRNA and Its
A Major Species of Mouse μ-opioid Receptor mRNA and Its

... variants, we chose a 353-bp DNA fragment within exon 3 as the probe. As shown in Fig. 1C, lanes 5 and 6, the hybridization signals appeared in two sharp bands, approximately 3.7 and 11.5 kb, respectively, with a similar intensity. Although five MOR splice variants have been reported to use exon 11 i ...
Informed Consent for Prenatal Diagnosis by
Informed Consent for Prenatal Diagnosis by

... 1) I understand that I may feel some discomfort during the amniocentesis as the needle passes into and out of my uterus. 2) I understand that there is a chance for needle damage to me and to the fetus. This risk is thought to be small as the needle is very thin, and the ultrasound is used to find a ...
Biochemistry
Biochemistry

... But how do the polymerase know where to begin? In other words, where does one gene start and stop and the next one begin? The starting point of a gene is marked by a certain base sequence which is called a promoter site. Analysis and comparison of sequences in many different bacterial promoters have ...
DNA - CS.Duke
DNA - CS.Duke

... The   code   in   the   class  DNABenchMark   can   be   used   to   benchmark   the  cutAndSplice  method.   The   code   given   to   you   will   pop-­‐up   a   file-­‐dialog   box   —   when   run   you   can   use   this   to   nav ...
Deciphering the molecular phylogenetics of the Asian honey bee
Deciphering the molecular phylogenetics of the Asian honey bee

... genomes into 3 main clades. All A. mellifera species were included in one clade, A. cerana species in other clade and A. koschevnikovi and A. florea in another clade. The estimated transition/transversion bias (R) is 0.46. The average nucleotide composition across the species is T=42.2%; A=32.4%; C= ...
pdf
pdf

... with a protein. Many protein-DNA complexes are sufficiently stable that they will remain together during electrophoresis through a (nondenaturing) polyacrylamide gel. A selected restriction fragment or synthetic duplex oligonucleotide is labeled (to make a probe) and mixed with a protein (or crude m ...
Human Biology - Genetics
Human Biology - Genetics

... If DNA is responsible for the inheritance of traits, then what is a gene? We hear that word, and we read that word often. For example, “She is a good athlete, because it’s in her genes.” “A test showed he carries a gene for cystic fibrosis.” “Fourteen percent of African Americans carry the gene for ...
E.Publication
E.Publication

... learn a great deal more, at a much faster pace. They are figuring out how genes work to do what they do. And they are uncovering the functions of specific genes. These discoveries are teaching us a great deal about the genetic instructions that construct and operate the human body. This new informat ...
A novel gene encoding a 54 kDa polypeptide is
A novel gene encoding a 54 kDa polypeptide is

... samples collected from oilfields. Three of them have been identified as Rhodococcus sp. IMT35, Pseudomonas sp. IMT37 and Pseudomonas sp. IMT40. SDS-PAGE analysis of the membrane of Rhodococcus sp. IMT35 revealed the presence of at least four polypeptides induced by propane. Polyclonal antibody raise ...
Document
Document

... eyebrows, eyelashes, nails, and hair are formed. Teeth and bones become denser in the 2nd trimester. The baby can even suck his or her thumb, yawn, stretch, and make faces. The nervous system is starting to function at this point in pregnancy. The reproductive organs and genitalia are now fully deve ...
Biological-Anthropology-2nd-Edition-Stanford-Test-Bank
Biological-Anthropology-2nd-Edition-Stanford-Test-Bank

... Each of these topics is intended to generate ideas for either a lecture/recitation format or discussion in the classroom. For most topics, students should be able to respond and participate in discussions based solely on reading the text. For others, you may need to provide further reading or other ...
The Co-Evolution of Genes and Culture Pedigrees
The Co-Evolution of Genes and Culture Pedigrees

... disaccharide. Infant mammals produce the enzyme lactase in their small intestines. Lactase breaks down lactose into glucose and galactose. These two simpler sugars, or monosaccharides, are easily absorbed through the small intestine and into the bloodstream. The blood delivers the sugars throughout ...
antiretroviral therapy during pregnancy and premature birth
antiretroviral therapy during pregnancy and premature birth

... There is an ongoing debate as to whether or not the use of combined antiretroviral treatment (cART) in pregnant women increases the risk of prematurity. An association between use of cART and preterm delivery was initially reported by the Swiss Mother and Child HIV Cohort Study (MoCHiV) in 1998 (1) ...
Mitochondrial transfer: Ethical, legal and social implications in assisted reproduction
Mitochondrial transfer: Ethical, legal and social implications in assisted reproduction

... theory they have more than two biological and social parents. Applying this sensationalism on a broader scale, would children born through embryo donation then have four parents? Nevertheless, researchers have suggested that if a paternal female relative is available and willing to donate oocytes fo ...
Structural variations in the human genome
Structural variations in the human genome

The nucleotide sequence of Saccharomyces cerevisiae
The nucleotide sequence of Saccharomyces cerevisiae

... high number of Ty and LTR elements in that region should give rise to large numbers of genome rearrangements (inversions, deletions and reciprocal translocations), which could explain this difference with the flanking regions. The construction of gene arrangement has led to general features that pro ...
File
File

... If these mutagens interact with DNA, they can produce mutations at high rates. Some compounds interfere with base-pairing, increasing the error rate of DNA replication. Others weaken the DNA strand, causing breaks and inversions that produce chromosomal mutations. Cells can sometimes repair the dama ...
CHAPTER ONE  INTRODUCTION 1
CHAPTER ONE INTRODUCTION 1

... CDK-activating kinases (CAKs), cyclins complexes with Cyclin Dependent Kinase (CDK) catalytic subunits to activate the phosphorylation process of the E2F transcription factorretinoblastoma protein (E2F/Rb) dimers. Phosphorylated RBR is demobilized from promoter-bound Rb/E2Fa-DPa hetero-dimer transcr ...
< 1 ... 54 55 56 57 58 59 60 61 62 ... 494 >

Cell-free fetal DNA

Cell-free fetal DNA (cffDNA) is fetal DNA circulating freely in the maternal blood stream. It can be sampled by venipuncture on the mother. Analysis of cffDNA provides a method of non-invasive prenatal diagnosis.cffDNA originates from the trophoblasts making up the placenta. It is estimated that 2-6% of the DNA in the maternal blood is fetal in origin. The fetal DNA is fragmented and makes its way into the maternal bloodstream via shedding of the placental microparticles into the maternal bloodstream (figure 1). Studies have shown that cffDNA can first be observed as early as 7 weeks gestation, and the amount of cffDNA increases as the pregnancy progresses. cffDNA diminishes quickly after the birth of the baby, so that it is no longer detectable in the maternal blood approximately 2 hours after birth. cffDNA is significantly smaller than the maternal DNA in the bloodstream, with fragments approximately 200bp in size. Many protocols to extract the fetal DNA from the maternal plasma use its size to distinguish it from the maternal DNA.Studies have looked at, and some even optimized, protocols for testing non-compatible RhD factors, sex determination for X-linked genetic disorders and testing for single gene disorders. Current studies are now looking at determining aneuploidies in the developing fetus. These protocols can be done earlier than the current prenatal testing methods, and have no risk of spontaneous abortion, unlike current prenatal testing methods. Non-invasive prenatal diagnosis (NIPD) has been implemented in the UK and parts of the US; it has clear benefits above the standard tests of chorionic villi sample (CVS) and amniocentesis which have procedure-related miscarriage risks of about 1 in 100 pregnancies and 1 in 200 pregnancies, respectively.As a method of prenatal diagnosis, cell-free fetal DNA techniques share the same ethical and practical issues, such as the possibility of prenatal sex discernment and sex selection.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report