Alleles are different versions of the same gene. In other words, alleles are different forms of a gene that arise due to mutations or changes in the DNA sequence of the gene. These mutations can occur spontaneously, or they can be inherited from parents...
How does AIDS affect the body? The human immunodeficiency virus (HIV) that causes AIDS attacks the body's immune system, making the person infected susceptible to other infections and illnesses, which can lead to death. Lots More Information Author's Note: How AIDS Works When I was in high...
A scientist is specifically interested in studying mutation A and the impact mutation B has on it. She requires a large population of flies with mutation A on both alleles, with about half that population carrying mutation B on at least one allele. Explain the quickest way to achieve this. ...
Antibiotics are chemicals that kill the bacteria cells but do not affect the cells that make up your body. For example, many antibiotics interrupt the machinery inside bacterial cells that builds the cell wall. Human cells do not contain this machinery, so they are unaffected. Different ...
When any two species are compared, biologists can find many detailed similarities in their cell structures and genetic sequences. For example, a yeast cell (fungus) has many genes and proteins that are a close match to similar structures f...
Theoretical biologists use models to demonstrate that cultural processes can affect human evolution, anthropologists are investigating cultural practices that modify current selection, and geneticists are uncovering alleles that have been subject to recent selection because of human activities. Theoretical ...
How many possible alleles are there for any given gene? How are alleles related to the phenotype? What is the probability of two AaBb parents producing an offspring that is heterozygous for at least one gene? a. 3/4 b. 1/2 c. 1/4 d. 7/8 Is cross species genetics possible? 1. Ho...
This is indicative of a preferential transmission of susceptibility alleles from mothers to offspring. Maternal transmission of autoimmunity could be influenced by the high preponderance of ADs in women as compared with the general population. However, this higher than expected frequency of maternal ...
How many alleles are there for a Mendelian trait? You hopefully know that there are at least 3 genes that work together to determine someone's blood phenotype. Assume that George, whose genotype is \mathbf{iiDdhh}, mated with Mary, whose genotype is \mathbf{I^A iDdHh}. What is the exp...
Both tasks are grossly distributed between three MHC I genes encoded in the MHC locus on human chromosome 6. Whereas all HLA-C alleles possess the ability to bind to KIRs, only one third of HLA-A and HLA-B alleles are able to engage them (reviewed in Ref. 2). In view of this fact...