Topic 4: Genetics

Beschreibung

IB Biology Karteikarten am Topic 4: Genetics, erstellt von ann.kwak am 23/03/2015.
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Karteikarten von ann.kwak, aktualisiert more than 1 year ago
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Zusammenfassung der Ressource

Frage Antworten
Gene A heritable factor that controls a specific characteristic
Allele One specific form of a gene, differing from other alleles by one or a few bases only and occupying the same gene locus as other alleles of the gene
Genome The whole of the genetic information of an organism
Gene mutation A change in the nucleotide sequence of a section of DNA, coding for a particular feature
Homologous chromosomes Chromosomes that share the same structural features(size, banding pattern, centromere position), and the same genes(alles may be different) at the same loci positions
Gene The allele combination of an organism
Phenotype The characteristics of an organism
Dominant Allele An allele that has the same effect on the phenotype whether it is present in the homozygous or heterozygous state
Recessive Allele An allele that only has an effect on the phenotype when present in the homozygous state
Codominant Alleles Pairs of alleles that both affect the phenotype when present in a heterozygote
Locus The particular position on homologous chromosomes of a gene
Homozygous Having two identical alleles of a gene
Heterozygous Having two different alleles of a gene
Carrier An individual that has one copy of a recessive allele that causes a genetic disease in individuals that are homozygous for this allele
Test Cross Testing a suspected heterozygote by crossing it with a known homozygous recessive
Sex linkage When a gene controlling a characteristic is found on a sex chromosome, and we associate the characteristic with gender
Clone A clone is a group of genetically identical organisms or a group of cells derived from a single parent cell
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