reflection Is cancer a disease due to genetics or environment? Cancer is a disease both caused by genetics and environmental factors. Each person has either proto-oncogenes or oncogenes. These are the genes that are responsible for regulating cell division. When a person has an oncogene it is a mutation of a proto-oncogene. The oncogene (dominant gene) tells the cell to continuously divide. This can be a problem if the cell is cancerous. Cancer cells are caused by a mutation in DNA. When the body is exposed
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The discovery of DNA is attributed to the research of three scientists in 1951; Francis Crick‚ Maurice Wilkins‚ and James Dewey Watson. They were all later accredited with the Nobel Prize in physiology and medicine in 1962. Thanks to their discovery‚ science has been able to research and learn from DNA blueprints and use recombinant DNA technology to discover answers‚ vaccines and build immunity for many viruses. In recent years science has been using this new technology to genetically modify animals
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cancer. There are two main types of genes that play a role in cancer‚ ocnogenes and tumor suppressor genes. An important difference between the two is that ocnogenes result from the activation of proto-ocnogenes‚ but tumor suppressor genes cause cancer when they are inactivated. Ocnogenes are mutations of certain normal genes called pro to-ocnogenes. Proto-ocnogenes
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Using P-element Induced Male Recombination to Generate a Deletion in the DMAP1 Gene on Chromosome Two in Drosophila melanogaster Abstract: The goal of this study was to induce a deletion in the DMAP1 gene on chromosome two in Drosophila melanogaster through P-element mobilization. The DMAP1 gene may be an essential gene‚ however not much is known about it. We attempted to uncover the function of DMAP1 by creating a series of genetic crosses and selecting for brown-eyed non-stubble male flies
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Segregation. This experiment investigated the effects of complete and incomplete dominance on the behavior of two different genes for chlorophyll production in tobacco. Two sets of approximately 50-100 tobacco seeds were planted for one week. The plants were the F2 result of two sets of monohybrid F1 crosses Gg x Gg and CyCg x CyCg. A chromosome for these plants has two sets of genes. The gene at one locus has two alleles that code for normal chlorophyll production. Dominant allele represented as G produce
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cancer can be caused by malfunctions and mutations in the genes that govern the cell repair itself. There are tumour suppressor genes‚ which work to fix DNA error. However‚ if damaged‚ tumour suppressor genes can lead to cancer. The second are oncogenes which are mutated form of normal genes known as proto-oncogenes those oncogenes carry DNA sequences known to lead to cancer. Viruses seem able to cause cancer in three ways The area of DNA and genes is a crucial one with regards to cancer... Presence
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form of genes. Haploid The term used when a cell has only one set of chromosomes. Diploid The term used when a cell has two sets of chromosomes. 2) What is the difference between homologous chromosomes and sister chromatids? Homologous chromosomes have the same arrangement of genes but are not connected to each other. Sister chromatids are identical: the result of DNA replication. The two connected chromatids are considered to be one chromosome. 3) What are tumor suppressor genes (11.18-11
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10: Living with Cancer and Other Chronic Conditions Key Terms regulatory gene Genes that control cell specialization‚ replication‚ DNA repair‚ and tumor suppression. oncogenes Faulty regulatory genes that are believed to activate the development of cancer. proto-oncogenes Normal regulatory genes that may become oncogenes. metastasis The spread of cancerous cells from their site of origin to other areas of the body. benign Noncancerous; localized nonmalignant tumors contained within a
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BS801 Genes R Us Questions for study: 1. What functions do transcription and translation carry out‚ and where are they carried out in the cell? Transcription: process of creating an equivalent RNA copy of a sequence of DNA Transcription is the first step leading to gene expression. The stretch of DNA transcribed into an RNA molecule is called a transcription unit and encodes at least one gene. Occurs in nucleus of the cell Translation: Translation is the production of proteins by decoding mRNA produced
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cancer cell‚ the genes which regulate cell growth and differentiation must be altered.[40] The affected genes are divided into two broad categories. Oncogenes are genes which promote cell growth and reproduction. Tumor suppressor genes are genes which inhibit cell division and survival. Malignant transformation can occur through the formation of novel oncogenes‚ the inappropriate over-expression of normal oncogenes‚ or by the under-expression or disabling of tumor suppressor genes. Typically‚ changes
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