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Human Genetics and Pedigrees
Human Genetics and Pedigrees

... fail to separate during meiosis, an individual may be born with three copies of a chromosome.  This is known as a trisomy.  Three copies of chromosome number 21.  Produces mild to severe mental retardation and characterized by an increased susceptibility to many diseases and a higher frequency of ...
Ch. 13.4: DNA Applications
Ch. 13.4: DNA Applications

... 1. What does PCR (polymerase chain reaction) do? 2. How goes gel electrophoresis work? 3. What is a DNA fingerprint? Why are DNA fingerprints unique to each person? ...
Biology I - WEB . WHRSD . ORG
Biology I - WEB . WHRSD . ORG

... Central Concepts: Genes allow for the storage and transmission of genetic information. They are a set of instructions encoded in the nucleotide sequence of each organism. Genes code for the specific sequences of amino acids that comprise the proteins characteristic to that organism. 3.1 Describe the ...
$doc.title

... Upstream open reading frame (uORF) Internal ribosome entry site (IRES) eIF2 A number of other factors All influence the rate of mRNA translation ...
Enhancer
Enhancer

Set 2 - The Science Spot
Set 2 - The Science Spot

... 1. What term refers to the physical appearance of a trait? Example: Yellow body color 2. What term refers to the gene that is expressed when two different genes for a trait are present in a gene pair? 3. If your grandparents are the parental generation, what term would refer to your parents? 4. What ...
Meiosis Part 1 Outline
Meiosis Part 1 Outline

... began attacking the plants. Since they were all alike in terms of DNA because they were clones, they fungus wiped them out quickly causing the famine to occur. B. Sexual Reproduction 1. This involves two parents to contribute DNA. This process “creates” variation, which is important in terms of surv ...
Chapter 14 notes
Chapter 14 notes

... dominant alleles, that are expressed even if a recessive allele is present. Examples: achondroplasia, Huntington’s disease, hypercholesterolemia Co-dominant alleles (2 dominant alleles) cause other disorders. Example Sickle Cell Anemia Go over all the disorders in your textbook. ...
Chapter 7 Supplement
Chapter 7 Supplement

... inserted into the vector DNA, forming a molecule of recombinant DNA. The recombinant DNA is then inserted into or taken up by a bacterial cell. The cell is next allowed to multiply, creating many genetically identical bacteria (clones), each of which is capable of producing the gene product. From th ...
Ask a Geneticist
Ask a Geneticist

... You’re right that these questions are basic. But this doesn’t mean they are simple. Sometimes the simplest questions about biology and genetics are the hardest to answer. To some extent the number of chromosomes and which genes are on each chromosome may be due to blind evolutionary chance. But that ...
From Gene to Protein—Transcription and Translation
From Gene to Protein—Transcription and Translation

... the figure on page 4 of your biology background and instructions handout.) Student answers may vary. Student should included: the idea that during protein synthesis the DNA “language” has to be converted in RNA “language” in order for the information it contains to be understood and carried out. Thi ...
Methods to analyze RNA expression
Methods to analyze RNA expression

... The following experimental techniques are used to measure gene expression and are listed in roughly chronological order, starting with the older, more established technologies. They are divided into two groups based on their degree of multiplexity. Multiplexity is a measure of how many different gen ...
Bacterial Variation
Bacterial Variation

... Phase variation is not unique to Salmonella flagellar antigens. It is also seen with other bacterial surface antigens. Also the mechanism of phase variation may differ in different species of bacteria (e.g. Neisseria; transformation). ...
13 Genetics - One Cue Systems
13 Genetics - One Cue Systems

... is a polymer of four different kinds of nucleotides. Chromosomes = Organizational unit of heredity material in the nucleus of eukaryotic organisms Gene = Unit of hereditary information that is made of DNA and is located on chromosomes Locus = Specific location on a chromosome that contains a gene ...
The concept of the gene during the time
The concept of the gene during the time

... variations in traits were caused by variations in inheritable factors (or, in today’s terminology, phenotype is caused by ...
Exam 4
Exam 4

... B) Prokaryotic mRNA receives a 5’ cap before translation C) In prokaryotes, transcription and translation of an RNA molecule can occur at the same time D) Prokaryotic DNA includes a promoter for each gene E) Prokaryotic ribosomes stop translating at one of three stop codons 35. Which of the followin ...
Analysing genomic data with seeded Bayesian networks
Analysing genomic data with seeded Bayesian networks

... and other databases contain data on transcription factors, their experimentelly-proven binding sites, and regulated genes. ...
CfE Higher Human Biology Unit 1 Human Cells
CfE Higher Human Biology Unit 1 Human Cells

... I can explain how DNA probes with fluorescent labels are used in identifying disease and in showing relationships between individuals e.g. paternity testing, and this can be carried out multiple times with microarrays. I can describe the difference between anabolic and catabolic processes, and expla ...
Principles of Heredity
Principles of Heredity

... For example, if your hair is red and your mother’s hair is red, write her name beside your hair. ...
A Zero-Knowledge Based Introduction to Biology
A Zero-Knowledge Based Introduction to Biology

... that contained all the polymerases and other enzymatic ingredients necessary for RNA transcription and translation. The synthetic virus was able to successfully replicate itself from this mixture.” ...
Chapter 9
Chapter 9

... in the eye is found in the sex chromosome. At least one functioning copy of the gene confers normal detection of red and green colors. A rare allele produces a non-functioning version of these proteins. Females get XX and thus get a greater chance to be normal, males get only one X, if the non-the f ...
Facing up to Complex Inheritance Patterns
Facing up to Complex Inheritance Patterns

... Polymorphism in the 5-HTT Gene In a prospective-longitudinal study of a representative birth cohort, we tested why stressful experiences lead to depression in some people but not in others. A functional polymorphism in the promoter region of the serotonin transporter (5-HT T) gene was found to moder ...
IntrotoBiotechRestrictionEnzymes2011
IntrotoBiotechRestrictionEnzymes2011

... • some restriction enzymes (like EcoRI) produce cuts in the DNA that result in the formation of sticky ends on the DNA fragments that are formed. • sticky ends indicates that unpaired bases are left hanging off the cut. other restriction enzymes produce blunt ends, that is, the DNA is cut directly ...
Transcription and Translation
Transcription and Translation

... • Once you have found the compliment, the mRNA strand must be completed. • After the mRNA is complete, the codons can be underlined. • The codons can then code for an amino acid. For instance, using the above strand, the process would appear as this: DNA G C TAAT G C A ...
3.2.1: Transcription and Translation
3.2.1: Transcription and Translation

... • Once you have found the compliment, the mRNA strand must be completed. • After the mRNA is complete, the codons can be underlined. • The codons can then code for an amino acid. For instance, using the above strand, the process would appear as this: DNA G C TAAT G C A ...
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Gene



A gene is a locus (or region) of DNA that encodes a functional RNA or protein product, and is the molecular unit of heredity. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. Most biological traits are under the influence of polygenes (many different genes) as well as the gene–environment interactions. Some genetic traits are instantly visible, such as eye colour or number of limbs, and some are not, such as blood type, risk for specific diseases, or the thousands of basic biochemical processes that comprise life.Genes can acquire mutations in their sequence, leading to different variants, known as alleles, in the population. These alleles encode slightly different versions of a protein, which cause different phenotype traits. Colloquial usage of the term ""having a gene"" (e.g., ""good genes,"" ""hair colour gene"") typically refers to having a different allele of the gene. Genes evolve due to natural selection or survival of the fittest of the alleles.The concept of a gene continues to be refined as new phenomena are discovered. For example, regulatory regions of a gene can be far removed from its coding regions, and coding regions can be split into several exons. Some viruses store their genome in RNA instead of DNA and some gene products are functional non-coding RNAs. Therefore, a broad, modern working definition of a gene is any discrete locus of heritable, genomic sequence which affect an organism's traits by being expressed as a functional product or by regulation of gene expression.
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