Genes And Selection Flashcards
What is adaptation
A feature that increases survival chances
What is an allele
A version of a gene
Biodiversity definition
The variety of genes, species, and habitats within a particular area
Classification definition
The organisation of organisms into groups
The two types of classification
Artifical
Phylogenetic
Conservation definition
The maintenance of ecosystems and biodiversity by humans to preserve the earth’s resources
What is a codon
A sequence of 3 bases on mRNA that codes for a specific amino acid
What is anticodon
3 bases on a tRNA that is specific to an mRNA codon
Degenerate definition
Muliple triplets can code for the same amino acid
Deletion definition
A removed nucleotide base
What is directional selection
Favours the extreme
Falls to the left or right of the population
Ecosystem diversity
A measure of the range of different habitats in an area
Genetic diversity
The number of different alleles on a population
Independent segregation
Random separation of homologous chromosomes in meiosis 1 that produces genetic variation
Natural selection
The process by the frequency of “advantages” alleles gradually increase in a population’s gene pool over time
What is a gene
A sequence of bases that codes for a protein which results in a characteristic
What is codominant definition
Alleles that are both expressed in the phenotype
What is homozygous
An organism that carries 2 copies of the same allele
What is heterozygous
An organism that carries two different alleles
