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Basic Principles of Heredity Notes AP Biology Mrs. Laux
Basic Principles of Heredity Notes AP Biology Mrs. Laux

... 4. crossed 2 pure plantsP generation a. began by studying only one trait at a time b. results in F1 (first filial) generationall offspring had only one trait expressed c. where did other trait go? 5. allowed F1 to self-pollinate F2 (second filial) generation Tall X short P All tall F1 3 tall:1 s ...
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... a genotype of + + / B car, and a phenotype of wide-bar red eyes. i. One X chromosome had a translocated fragment of Y chromosome. It carried the wild-type alleles (+ +, red and non-bar) for both traits. ii. The second X chromosome had lost a region by translocation to chromosome 4. This chromosome w ...
BIO305 - National Open University of Nigeria
BIO305 - National Open University of Nigeria

... different proteins. The small size of E.coli genome provides advantages for genetic analysis and the sequence of the entire E.coli genome has been determined. Molecular genetic experiments are further facilitated by the rapid growth of E.coli under well defined laboratory conditions. E. coli can di ...
I Gray x White
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... 63- Jane Smith has type A blood and Jim Smith has B type blood. They have a baby with O type blood. What blood types could additional children have? A. A B. B C. 0 D. Both A and B types E. All of these 64- Cloning produces organisms that have A. identical genes B. all dominant genes C. all recessive ...
Genetics 184 - Ronin Genetics
Genetics 184 - Ronin Genetics

... produced a matroclinous white XXY female. Alternatively, if the X chromosomes were directed to the polar body, a nullo-X ovum was produced, which when fertilized by an X-bearing sperm, produced a red-eyed patroclinous XO male. This hypothesis was proved cytologically for both classes of exception. S ...
statgen8
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... The alleles A1 and B1 may be on the same chromosome within the pair, in which case A1 and B1 are said to be "coupled"; ...
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... whom she had cohabitated long before the clutch was laid) and her unusual clutch of four progeny. This analysis involved six different loci or sites on the genome (A through F). A-F are located on different autosomal chromosomes. The alleles of each site are indicated by different numbers. These loc ...
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Organismal Biology Section Two Exam
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Genetic Technology - Mr. Swords' Classes
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... fundamental unsolved problem in biology is the organization of the eukaryotic genome in the interphase nucleus. During interphase, chromatin must be maintained in structures that allow site-specific regulated transcription and temporally controlled DNA replication. Normally, it is not possible to re ...
Chapter 21
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... Other Repetitive DNA, Including Simple Sequence DNA • About 15% of the human genome consists of duplication of long sequences of DNA from one location to another • In contrast, simple sequence DNA contains many copies of tandemly repeated short sequences ...
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... (current explanations reviewed in Greiner et al., 2015). The sexual asymmetry is even more pronounced in higher eukaryotes characterized by true sexes with oogamy, where females produce few large oocytes and males specialize in mass-production of small and often motile sperm (Billiard et al., 2011). ...
Soft Computing : Optimization Techniques using Genetic Algorithms
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A group of interacting yeast DNA replication genes.

... Figure 2 also shows that two other conditional mutants in the group, cdc46-1 and cdc47-1, caused cells to arrest with a single genomic equivalent of DNA. Diploid strains with homozygous mutations at either of these loci [DBY4921 and DBY4150), w h e n shifted to nonpermissive temperature (in this cas ...
video slide
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... If these two genes were on different chromosomes, the alleles from the F1 dihybrid would sort into gametes independently, and we would expect to see equal numbers of the four types of offspring. If these two genes were on the same chromosome, we would expect each allele combination, B+ vg+ and b vg, ...
Arabidopsis Separase AESP Is Essential for Embryo Development
Arabidopsis Separase AESP Is Essential for Embryo Development

... meiosis in a number of organisms, including Caenorhabditis elegans, mammals, and Arabidopsis thaliana, have shown that similar to the situation during mitosis in animal cells, a significant amount of cohesin is either removed from or redistributed on prophase chromosomes before anaphase I in higher ...
Genomes
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... Other Repetitive DNA, Including Simple Sequence DNA • About 15% of the human genome consists of duplication of long sequences of DNA from one location to another • In contrast, simple sequence DNA contains many copies of tandemly repeated short sequences ...
A model for repair of radiation-induced DNA double
A model for repair of radiation-induced DNA double

... radiodurans there was complete restoration of wild-type deinococcal resistance to all tested forms of damage, including ionizing radiation(26).This observation indicates that the deinococcal DNA Pol I is not uniquely qualified, since E. coliDNA Pol I can do the same job, i.e. DNA Pol I is necessary, ...
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Chromosome



A chromosome (chromo- + -some) is a packaged and organized structure containing most of the DNA of a living organism. It is not usually found on its own, but rather is complexed with many structural proteins called histones as well as associated transcription (copying of genetic sequences) factors and several other macromolecules. Two ""sister"" chromatids (half a chromosome) join together at a protein junction called a centromere. Chromosomes are normally visible under a light microscope only when the cell is undergoing mitosis. Even then, the full chromosome containing both joined sister chromatids becomes visible only during a sequence of mitosis known as metaphase (when chromosomes align together, attached to the mitotic spindle and prepare to divide). This DNA and its associated proteins and macromolecules is collectively known as chromatin, which is further packaged along with its associated molecules into a discrete structure called a nucleosome. Chromatin is present in most cells, with a few exceptions - erythrocytes for example. Occurring only in the nucleus of eukaryotic cells, chromatin composes the vast majority of all DNA, except for a small amount inherited maternally which is found in mitochondria. In prokaryotic cells, chromatin occurs free-floating in cytoplasm, as these cells lack organelles and a defined nucleus. The main information-carrying macromolecule is a single piece of coiled double-stranded DNA, containing many genes, regulatory elements and other noncoding DNA. The DNA-bound macromolecules are proteins, which serve to package the DNA and control its functions. Chromosomes vary widely between different organisms. Some species such as certain bacteria also contain plasmids or other extrachromosomal DNA. These are circular structures in the cytoplasm which contain cellular DNA and play a role in horizontal gene transfer.Compaction of the duplicated chromosomes during cell division (mitosis or meiosis) results either in a four-arm structure (pictured to the right) if the centromere is located in the middle of the chromosome or a two-arm structure if the centromere is located near one of the ends. Chromosomal recombination during meiosis and subsequent sexual reproduction plays a vital role in genetic diversity. If these structures are manipulated incorrectly, through processes known as chromosomal instability and translocation, the cell may undergo mitotic catastrophe and die, or it may unexpectedly evade apoptosis leading to the progression of cancer.In prokaryotes (see nucleoids) and viruses, the DNA is often densely packed and organized. In the case of archaea by homologs to eukaryotic histones, in the case of bacteria by histone-like proteins. Small circular genomes called plasmids are often found in bacteria and also in mitochondria and chloroplasts, reflecting their bacterial origins.
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