OCR A Level Biology A Level Learner Resource 1
... This simulation lets you explore the activity of two structural genes and a regulatory gene in the bacterium Escherichia coli. This example of regulating genes in a prokaryote was the first type of control of gene expression to be discovered, in 1961 (Jacob and Monod). You can add and remove compone ...
... This simulation lets you explore the activity of two structural genes and a regulatory gene in the bacterium Escherichia coli. This example of regulating genes in a prokaryote was the first type of control of gene expression to be discovered, in 1961 (Jacob and Monod). You can add and remove compone ...
Announcements DNA Invertebrates DNA DNA DNA Code
... • Made of four nucleotides strung together by two sugar-phosphate backbones (deoxyribose). • Strands are coupled by H-bonds between nucleotides (A-T G-C) . • Composed of two complimentary strands arranged in a helix. • DNA has direction - 5’ to 3’ • Stored as chromosomes in the nucleus. ...
... • Made of four nucleotides strung together by two sugar-phosphate backbones (deoxyribose). • Strands are coupled by H-bonds between nucleotides (A-T G-C) . • Composed of two complimentary strands arranged in a helix. • DNA has direction - 5’ to 3’ • Stored as chromosomes in the nucleus. ...
Sex linked genetic disorders are associated with problems with the
... (one from the mother and one from the father), and more or less chromosomes would be an abnormal number that can cause problems. How is it, then, that we can get by with females being XX and having two copies of all of the genes on the X chromosome, while males, being XY, only have one copy of most ...
... (one from the mother and one from the father), and more or less chromosomes would be an abnormal number that can cause problems. How is it, then, that we can get by with females being XX and having two copies of all of the genes on the X chromosome, while males, being XY, only have one copy of most ...
Recombinant DNA Simulation
... Introduction: One of the most important processes developed by biotechnologists was the procedure where a gene is removed from the DNA of one organism and inserted into the DNA of another organism. This technique is called Recombinant DNA. The entire procedure is dependent upon using the correct res ...
... Introduction: One of the most important processes developed by biotechnologists was the procedure where a gene is removed from the DNA of one organism and inserted into the DNA of another organism. This technique is called Recombinant DNA. The entire procedure is dependent upon using the correct res ...
Unit 5 - Notes
... inherited as "particles", offspring receive a "piece" from each parent, some pieces may hide the others ...
... inherited as "particles", offspring receive a "piece" from each parent, some pieces may hide the others ...
Mutations Notes - Oakman School News
... Read the following notes and complete the concept map – attached - on your own paper Gene Mutations ...
... Read the following notes and complete the concept map – attached - on your own paper Gene Mutations ...
Eukaryotic Transcription In all species, transcription begins with the
... of a ribose (5-carbon) sugar where DNA has deoxyribose (one less oxygen atom) in its sugar-phosphate backbone). Unlike DNA replication, mRNA transcription can involve multiple RNA polymerases on a single DNA template and multiple rounds of transcription (amplification of particular mRNA), so many mR ...
... of a ribose (5-carbon) sugar where DNA has deoxyribose (one less oxygen atom) in its sugar-phosphate backbone). Unlike DNA replication, mRNA transcription can involve multiple RNA polymerases on a single DNA template and multiple rounds of transcription (amplification of particular mRNA), so many mR ...
bio_ch08-5_transcript redo
... You might consider it to be odd to describe the genetic as a punctuation of stop and start codes. The Latin word puctum means “point” and is derived form an older form meaning “to pierce or puncture.” Punctuation, in a general sense, signifies an interruption. The word punctuate can also be used to ...
... You might consider it to be odd to describe the genetic as a punctuation of stop and start codes. The Latin word puctum means “point” and is derived form an older form meaning “to pierce or puncture.” Punctuation, in a general sense, signifies an interruption. The word punctuate can also be used to ...
Cystic Fibrosis – This results in a malformed ion channel, causing
... the help they need from an early age. For these reasons, children born in Illinois are screened at birth for certain types of deafness or hearing difficulties. As with all the other tests of this page, the hearing screening test is only meant for screening, and a positive result simply means that fu ...
... the help they need from an early age. For these reasons, children born in Illinois are screened at birth for certain types of deafness or hearing difficulties. As with all the other tests of this page, the hearing screening test is only meant for screening, and a positive result simply means that fu ...
How many chromosomes are shown in a normal human karyotype?
... determined to be part of the same DNA sequence. Notice that the fragments are single stranded. Determine the single-stranded DNA sequence that the fragments below are part of. Explain your ...
... determined to be part of the same DNA sequence. Notice that the fragments are single stranded. Determine the single-stranded DNA sequence that the fragments below are part of. Explain your ...
Basic Genetics & Background on Genetic Testing
... • DNA carries this genetic information. • Mutations can occur in DNA that cause debilitating conditions and these mutations can be passed on to offspring. • Techniques exist that can analyse the DNA sequences in a human. • It is possible to identify genetically determined health problems or health r ...
... • DNA carries this genetic information. • Mutations can occur in DNA that cause debilitating conditions and these mutations can be passed on to offspring. • Techniques exist that can analyse the DNA sequences in a human. • It is possible to identify genetically determined health problems or health r ...
Molecular Structure of DNA and RNA part 1 powerpoint
... Avery, MacLeod and McCarty realized that Griffith’s observations could be used to identify the genetic material They carried out their experiments in the 1940s ...
... Avery, MacLeod and McCarty realized that Griffith’s observations could be used to identify the genetic material They carried out their experiments in the 1940s ...
Zoo/Bot 3333
... 6. Which of the following most accurately represents the map distance between the disease gene and the marker (probe DNA) locus? a) 0.02 map units; b) 1 map unit; c) 11 map units; d) 15.4 map units; e) 22 map units. Consider the gel at the right, derived from a sequencing reaction based on the Sange ...
... 6. Which of the following most accurately represents the map distance between the disease gene and the marker (probe DNA) locus? a) 0.02 map units; b) 1 map unit; c) 11 map units; d) 15.4 map units; e) 22 map units. Consider the gel at the right, derived from a sequencing reaction based on the Sange ...
BPS 555
... Ribosomes are large RNA-protein complexes that form a structural framework for polypeptide synthesis. In eukaryotes: 60S and 40S subunits 60S is comprised of 28S, 5.8 and 5S rRNA and about 50 proteins 40S is comprised of 18S RNA and about 30 ribosomal proteins. It is the RNA components that are prim ...
... Ribosomes are large RNA-protein complexes that form a structural framework for polypeptide synthesis. In eukaryotes: 60S and 40S subunits 60S is comprised of 28S, 5.8 and 5S rRNA and about 50 proteins 40S is comprised of 18S RNA and about 30 ribosomal proteins. It is the RNA components that are prim ...
Lecture: How do neurons work
... B. There are no obvious restriction sites surrounding the husK gene, yet you still need to insert this gene into pCM999. How will you do this? (Hint: The 5’ end of a PCR primer does not need to be complementary to anything as long as there is a long stretch of complementary bases at the 3’ end. Thus ...
... B. There are no obvious restriction sites surrounding the husK gene, yet you still need to insert this gene into pCM999. How will you do this? (Hint: The 5’ end of a PCR primer does not need to be complementary to anything as long as there is a long stretch of complementary bases at the 3’ end. Thus ...
Lecture 14 Gene Regulation
... • When both glucose and lactose are in the medium, E. coli preferentially uses glucose, due to catabolite repression (glucose effect) • a. Glucose metabolism greatly reduces cAMP levels in the cell. • b. The CAP-cAMP level drops, and is insufficient to maintain high transcription of the lac genes. • ...
... • When both glucose and lactose are in the medium, E. coli preferentially uses glucose, due to catabolite repression (glucose effect) • a. Glucose metabolism greatly reduces cAMP levels in the cell. • b. The CAP-cAMP level drops, and is insufficient to maintain high transcription of the lac genes. • ...
Quiz 12
... in the F1 generation and why the purple F1’s look just as purple as the purple P’s? A) Alternative versions of heritable “factors” (i.e., alleles) B) For each character an organism inherits two alleles, one from each parent C) If the two alleles at a locus differ, then one (the dominant allele) dete ...
... in the F1 generation and why the purple F1’s look just as purple as the purple P’s? A) Alternative versions of heritable “factors” (i.e., alleles) B) For each character an organism inherits two alleles, one from each parent C) If the two alleles at a locus differ, then one (the dominant allele) dete ...
DNA vs. RNA
... Need punctuation to identify where coding region begins and ends: promoters - signals in DNA that indicate where the enzyme should bind (“start sequence”). Similar signals in DNA cause transcription to stop when the new RNA molecule is completed. ...
... Need punctuation to identify where coding region begins and ends: promoters - signals in DNA that indicate where the enzyme should bind (“start sequence”). Similar signals in DNA cause transcription to stop when the new RNA molecule is completed. ...
Mendel
... One gene affects the __________ of another Bombay phenotype- encodes for glycoprotein on red blood cell needed to attach the A-type or B-type ID A person who is homozygous recessive for Bombay (____) will have ____ blood regardless of their ABO genotype ...
... One gene affects the __________ of another Bombay phenotype- encodes for glycoprotein on red blood cell needed to attach the A-type or B-type ID A person who is homozygous recessive for Bombay (____) will have ____ blood regardless of their ABO genotype ...
Genetics Test 2
... 26) The genetic disorder trisomy 21 (Down syndrome) is caused by what genetic event? NONDISJUNCTION 27) The gene for red/green colorblindness in humans is recessive and primarily affects males. It must be located on which chromosome? X ...
... 26) The genetic disorder trisomy 21 (Down syndrome) is caused by what genetic event? NONDISJUNCTION 27) The gene for red/green colorblindness in humans is recessive and primarily affects males. It must be located on which chromosome? X ...
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.