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What is the process in which DNA changes to form new alleles?
Crossing-over
What is the process of designating genes or DNA fragments to chromosomes in genetics?
The process of assigning genes or DNA fragments to chromosomes in genetics is called gene mapping. This involves determining the chromosomal location of a gene based on its phenotype, inheritance patterns, or physical distance from known genetic markers. Techniques such as linkage analysis, cytogenetic mapping, and molecular mapping are commonly used for this purpose.
Are alleles made up of DNA?
All alleles contain DNA. They are the genes. An allele is one form of a gene. For example, the gene for flower color in pea plants has two alleles, one for purple flower color, and one for white flower color.
How alleles and genes related?
Genes and alleles are related because alleles are inside a gene. Genes are made up by alleles. A gene is DNA. The allele is like piece of DNA inside a gene.
What does genetic recombiation mean?
Genetic recombination is the process by which two DNA molecules exchange genetic information. This process results in the production of a new combination of alleles.
How is chromatography used in DNA mapping to identify a criminal in a murder case?
Chromatography is an important tool in DNA mapping. It can be used to match any DNA to previous DNA that is already on record from other crimes.
DNA coding regions that affect the same trait are called?
alleles
Why is chromatography used in DNA mapping to identify a criminal in a justice case?
Chromatography is a tool where it makes it easier to analyze the DNA of a suspect and to match that analysis with any previously recorded DNA samples on file or what DNA was found at the crime scene. Chromatography is basically a separation technique based on the interactions of two different compounds in two phases: the mobile phase and the stationary phase, as the compounds travel through the supporting medium. It is a tool that helps make DNA mapping easier since it is literally "colour writing" specific alleles that are found in a sample of DNA.
What is ultimately responsible for introducing new alleles into a population?
New alleles are introduced into a population through mutations in DNA which can occur spontaneously, typically during the process of DNA replication. Mutations can result from errors in DNA replication, exposure to environmental factors such as radiation or chemicals, or random genetic recombination during sexual reproduction.
What are two common uses for DNA testing?
DNA Fingerprinting, and Testing for alleles.
Where do alleles come from?
Alleles come from mutations in the DNA sequence of a gene. These mutations can be the result of errors during DNA replication, exposure to mutagenic agents, or genetic recombination. Once a mutation occurs, it can become a new allele that contributes to genetic diversity.
Are alleles different forms of a gene?
No, alleles are different forms of a gene. The gene is the portion of DNA/RNA that codes for a particular trait (chain of proteins). The alleles are the possible code bits that could be in that part of the DNA and different alleles will result in different traits being expressed. E.g., part of your DNA codes for your eye color, and in that part there are a number of different alleles that could be there. A certain allele might make you blue-eyed, while another would make you brown-eyed, etc. This is something of a simplification as many traits are expressed via multiple alleles, but that is the general idea.
