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CSIR NET Life Sciences - UNIT 2 part B
Practice life sciences questions using real examples from 2012.
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Blood Type Problems
What will be the blood type of the probable progenies of blood type AB and blood type O parents? Let's solve this problem in the scenarios below: What will be the phenotype from a father with heterozygous type A, and a mother with...
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CRISPR Cas9 System
The CRISPR-Cas9 system, adapted from a bacterial defense mechanism, uses Cas9 nuclease and a guide RNA (gRNA) to target and cut specific DNA sequences for genome editing. Cas9, guided by the gRNA, binds to complementary DNA and creates...
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Two Point Mapping
To determine if two genes are linked, observe the variation in offspring numbers—if all genotypes occur equally, the genes are not linked. If offspring counts differ, the most frequent genotypes represent parental types, and the less...
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Three Point Mapping
A three-point linkage cross helps determine gene order and distances between three linked genes using observed recombination frequencies. The process involves identifying parental types (most frequent), double crossovers (DCO) (least...
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ABO Genes: Blood Group Antigens at Genetic Level
The ABO gene on chromosome 9 encodes enzymes that determine an individual’s blood group by modifying the H antigen into A or B antigens via glycosyltransferases. The A allele produces an enzyme that adds N-acetylgalactosamine (GalNAc),...
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Zinc Finger Nucelases
Zinc Finger Nucleases (ZFNs) are engineered molecular tools composed of a zinc finger DNA-binding domain fused to a FokI DNA-cleavage domain, allowing precise targeting and cutting of specific DNA sequences. Once the DNA is cut, natural...
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Modified Opium Poppies: Promising Advances in Medical Treatment
Researchers in Australia have successfully modified opium poppies to produce a new compound called reticulane instead of morphine and codeine. This breakthrough could lead to significant advancements in medical treatment, particularly in...
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Advancements in Recombinant DNA Technology: Revolutionizing Medicine
This video discusses the use of recombinant DNA technology in the production of therapeutic proteins. It explains how genetic engineering allows for the mass production of safe and effective versions of proteins that the human body...
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Discovering the Dwarfing Gene: Implications for Wheat and Other Crops
This video discusses the discovery of a gene, RHT, that controls the dwarfing process in wheat plants. Scientists at the John Innes Agricultural Research Institute have found that this gene, when isolated and used in breeding, can...
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Exploring the Potential of Gene Therapy for HIV: Current Research and Future Possibilities
Researchers at the National Institute for Medical Research have discovered a gene in humans that is similar to the one found in monkeys, which protects against retroviruses. While this gene is fully activated against other retroviruses,...
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New Hope for IPF Patients: Breakthrough Treatment Discovered
Researchers at the Mayo Clinic have developed a promising new treatment for idiopathic pulmonary fibrosis (IPF), a fatal lung disease that currently has no cure. By identifying the gene responsible for the disease and using the cancer...
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Scientists Aim to Beat Cancer Before Birth: Screening Embryos for Genetic Diseases
In this London laboratory, scientists are using test tube techniques to screen embryos for genetic diseases, specifically focusing on inherited bowel tumors. By removing one cell from each embryo and screening it for the cancer gene,...
Astrum
What's Preventing Us From Colonising the Solar System?
Evolution is slow. What if we get the power to take matters into our own hands?
Science ABC
What are Mutations and what are the different types of Mutations?
A mutation is a random change in the DNA. Mutations can be neutral, which means it does not cause a change in a trait of the organism, or it could cause a beneficial or a harmful mutation. There are a few different types of mutations -...
Science ABC
What are GMOs (Genetically Modified Organisms)?
GMO or genetically modified organisms are organisms with their DNA modified, usually by adding new or different DNA from another organism. GM crops are crops that have genes from bacteria. These genes allow the plants to either produce...
Science ABC
Is the Serial Killer Gene Real?
The infamous “serial killer gene� is the monoamine oxidase-A gene, also known as the MAO-A gene or the warrior gene. It codes for an enzyme that metabolizes neurotransmitters such as dopamine, norepinephrine, and serotonin. Dopamine...
Science ABC
Are Humans The Only Species To Drink Milk Of Other Species?
When it comes to mammals, we are the only species that drinks milk directly from other species, or we are the only one that does so in adulthood. Most juvenile animals can drink and digest their mothers milk because they carry the enzyme...
Science ABC
Why Do Some People Look More Like Their Grandparents Than Their Parents?
Our physical appearance is significantly influenced by our genes, which are inherited from our parents, who in turn receive their genetic material from their own parents. When your genetic makeup closely mirrors that of your...
Science ABC
Why Can't Animals Talk Like Humans?
Talking is a unique thing. It is a combination of sounds and syllables arranged in various combinations and lengths to express various thoughts, emotions, ideas, etc. Apart from the basic production of the sound, a major component is the...
Science ABC
Are Dimples Genetic Defects?
Dimples are universally considered a physically attractive feature. Contrary to this positive perception, it results from a genetic defect that gives rise to a double or bifid zygomaticus muscle underlying the cheeks. A dimple simply...
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Dominant allele
The version of a particular gene that takes precedence over other variants, being expressed even if only one copy is present. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
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Recessive allele
A recessive allele is the version of a gene that will only be expressed if two copies are present, one from each set of chromosomes. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and...