Genetic Laboratory Testing
Genetic Laboratory Testing - Related Videos
12:45
Testing For Genetically Modified Foods
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Genetic modification of foods has been a controversial issue due to debated concerns over health and environmental safety. This experiment demonstrates technical understanding of how food DNA is genetically identified, allowing for educated decision making about the safety and potential dangers of using genetically modified organisms (GMOs) in food supplies. Polymerase Chain Reaction (PCR) is used to amplify food DNA...
07:45
Small-Cage Laboratory Trials of Genetically-Engineered Anopheline Mosquitoes
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2021
The protocols reported here illustrate three alternative ways to assess the performance of genetically-engineered mosquitoes destined for vector control in laboratory-contained small cage trials. Each protocol is tailored to the specific modification the mosquito strain bears (gene drive or non-gene drive) and the types of parameters measured.
00:09
Semiconductor Sequencing for Preimplantation Genetic Testing for Aneuploidy
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Cited by 2 •
2019
Here, we introduce a semiconductor sequencing method for preimplantation genetic testing for aneuploidy (PGT-A) with the advantages of short turnaround time, low cost, and high throughput.
10:17
Laboratory Protocol for Genetic Gut Content Analyses of Aquatic Macroinvertebrates Using Group-specific rDNA Primers
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Cited by 7 •
2017
Most common gut content analyses of macroinvertebrates are visual. Requiring intense knowledge about morphological diversity of prey organisms, they miss soft bodied prey and, due to strong comminution of prey, are nearly impossible for some organisms, including amphipods. We provide detailed, novel genetic approaches for macroinvertebrate prey identification in the diet of amphipods.
06:00
Experimental Protocol for Using Drosophila As an Invertebrate Model System for Toxicity Testing in the Laboratory
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Cited by 10 •
2018
In this paper, we provide a detailed protocol for exposing species in the genus Drosophila to pollutants with the goal of studying the impact of exposure on a range of phenotypic outputs at different developmental stages and for more than one generation.
FAQs
The material analyzed determines the biological question. DNA can reveal sequence variation, RNA can indicate expression changes, chromosomes can expose larger-scale abnormalities, and related molecular markers can provide additional genetic information. Selecting among these targets allows a laboratory to examine inherited or acquired differences, gene activity, or chromosomal status rather than treating every result as the same type of evidence.
Amplification and sequencing serve different purposes within the workflow. Amplification increases the amount of a selected sequence so it can be examined, whereas sequencing determines the sequence information present after the sample has been prepared. The choice affects whether the analysis focuses on a selected region or on sequence data that can be compared with a reference genome.
Comparison with a reference genome turns laboratory measurements into interpretable findings. Differences between the sample and the reference can be recorded as genetic variants, while the analysis can also identify expression changes or chromosomal abnormalities when those data types were measured. This comparison provides the basis for relating molecular results to traits, disease, or developmental phenotypes.
Developmental biology uses molecular measurements to connect gene activity with cell fate, tissue formation, and embryonic patterning. Results from Genetic Laboratory Testing can show whether particular genetic or expression differences occur alongside developmental changes in model organisms or human samples. This connection helps researchers investigate how genetic information relates to the organization and progression of developing tissues.
A laboratory workflow generally moves from sample collection and nucleic-acid isolation to either amplification of selected sequences or preparation for sequencing. The resulting material is then analyzed against an appropriate reference genome, with the output interpreted as variants, expression changes, or chromosomal abnormalities. Keeping these stages distinct helps connect the laboratory result to the biological question being tested.
In developmental biology, this approach is useful when researchers need to connect molecular measurements with events in model organisms or human samples. Results can support studies of cell fate, tissue formation, and embryonic patterning, while also contributing to developmental disease research. The method links observations at the genetic level with broader changes in developing biological systems.
Genotype-phenotype studies use test results to examine how detected genetic differences correspond to biological traits or disease-related features. In developmental research, the same data can help evaluate whether an experimental model reflects the relevant molecular or phenotypic pattern. This makes the results useful for examining trait relationships and for validating models used to study developmental processes.