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Review - UCR Class!
Review - UCR Class!

... • Thylakoid membrane and plasma membrane ...
Patterns of inheritance
Patterns of inheritance

... each somatic cell contains two copies of each chromosome, and two copies of each gene. The exceptions to this rule are the sex chromosomes that determine sex in a given species. For example, in the XY system that is found in most mammals - including human beings - males have one X chromosome and one ...
Chapter 13
Chapter 13

DNA Transcription and Translation
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... Exons- codes for a protein Before RNA leaves the nucleus, introns are removed and exons are spliced together A cap and poly A tail are added to ends of the sequence mRNA leaves the nucleus through the nuclear ...
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... that established permanent residence inside other cells (endosymbiosis). ...
PowerPoint Presentation - The GS FLX Sequencer. What is it and
PowerPoint Presentation - The GS FLX Sequencer. What is it and

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Part 1 - Evolutionary Biology
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Imprinting and Dosage Compensation-2015
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Förslag på process för tentamen
Förslag på process för tentamen

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... d. Genes that perform similar functions are scattered around the genome and must be coordinated. e. Transcription regulator sequences can be great distances from the genes they regulate. f. Cell specialization means that specific sets of genes are activated or inactivated depending on cell type. ...
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... 8.1 Identifying DNA as the Genetic Material The transcription process is similar to replication. • Transcription and replication both involve complementary (matching up) base pairing. • The two processes have different end results. – Replication copies all the DNA; transcription copies one gene gro ...
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... and can thus be packaged in virus particles. e. Most RFLPs are multi-allelic and can thus be used to distinguish many different individuals in a given population. Answer e 22. (1 point) Which one of the following statements is true? a. The presence of an origin of replication (ori) in a plasmid will ...
CHAPTER 14: DNA: THE GENETIC MATERIAL
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... determining that it was a semiconservative process; each strand served as a template for the production of a new one and each old and new strand then intertwined to become a new helix. Double-stranded DNA replication is complicated since new nucleotides must be added to both the 5’ to 3’ strand and ...
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... both strands to yield a set of double-stranded DNA fragments with single-stranded sticky ends. The sticky ends readily form base pairs with complementary single-stranded segments on other DNA molecules. The enzyme DNA ligase can seal the strands to produce recombinant DNA molecules. Activity20B: Res ...
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Chapter 17 Presentation Transcription and Gene Expression

... heavily methylated. In many cells that have inactivated genes, the genes are more heavily methylated than in cells where the genes are active. ...
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... most plants and animals have centromere that are situated as one specific position in each chromosomes. ...
MICRO. 555 (555 Microbial Molecular Genetics) Dr.Afaf Ibrahim
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Glossary Excerpted with modification from the Glossary in Genes V
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... tested in pairwise combinations in trans; defines a genetic unit (the cistron) that might better be called a noncomplementation group. Conditional lethal mutations kill a cell or virus under certain (nonpermissive) conditions, but allow it to survive under other (permissive) conditions. Conjugation ...
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Genome Organization

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1 - LWW.com

... silver particles within the nuclei, a single black dot represents a single copy of the IGF1R gene, whereas a cluster of black dots concentrated so closely together that single dots cannot be resolved are considered amplified genes. A single black dot was given a score of one and clusters, if present ...
Study Guide Chapter 8 Science Study Guide-CH 8
Study Guide Chapter 8 Science Study Guide-CH 8

... add to the potential for variation in the species and can also lead to the evolution of a new species when the mutation actually helps the offspring to survive in a particular environment. For example, a mutation that resulted in an offspring having longer claws might help that offspring catch food ...
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Extrachromosomal DNA



Extrachromosomal DNA is any DNA that is found outside of the nucleus of a cell. It is also referred to as extranuclear DNA or cytoplasmic DNA. Most DNA in an individual genome is found in chromosomes but DNA found outside of the nucleus also serves important biological functions.In prokaryotes, nonviral extrachromosomal DNA is primarily found in plasmids whereas in eukaryotes extrachromosomal DNA is primarily found in organelles. Mitochondrial DNA is a main source of this extrachromosomal DNA in eukaryotes. Extrachromosomal DNA is often used in research of replication because it is easy to identify and isolate.Extrachromosomal DNA was found to be structurally different from nuclear DNA. Cytoplasmic DNA is less methylated than DNA found within the nucleus. It was also confirmed that the sequences of cytoplasmic DNA was different from nuclear DNA in the same organism, showing that cytoplasmic DNAs are not simply fragments of nuclear DNA.In addition to DNA found outside of the nucleus in cells, infection of viral genomes also provides an example of extrachromosomal DNA.
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