Flashcards in Genetics 3.1 Genes Deck (9)
What is a genome?
Genome is the whole of the genetic information of an organism.
What is a gene?
Gene is a heritable factor that controls a specific characteristic.
What is an allele?
An allele is one of a number of different version of a gene
What is the Human Genome Project?
The HGP is an international research effort to sequence , map and understand all the genes of members of species, homeosapiens. 18 different countries were involved. It began in 1990 and finished in 2003
What importance does the Human Genome Project have? Why do we need the sequencing of the complete human genome?
By being able to read nature's complete genetic blueprint of a human being:
- to learn about the causes of genetic diseases and thus find cures and treatments.
- to discover more about how different people are related to each other and to other species /evolutionary relationships
- to understand more about the aging process
What is gene mutation?
Gene mutation is natural process that causes changes in the DNA sequence caused by a mutagen. The change in DNA sequence causes a change in mRNA, and amino acid sequence and thus produce new alleles.
What is mutagen?
Mutagen is a physical or chemical factor that causes a change in DNA base sequence.
What are the consequences of mutations?
There negative effects of mutations such as cancer. Positive effects of mutation are the creation of new alleles for adaption. Sometimes there are no consequences at all as the it codes for the same amino acid.