an inheritable factor that controls a specific characteristic. Occupies a position on a chromosome known as a locus.
one specific form of gene, differeing from other alleles by one or a few bases only. Occupies the same locus as other alleles of the same gene.
the whole of the genetic information of an organism.
refers to the total of the genes carried by the individual members of a population.
a permanent change in the sequence of base pairs in the DNA that makes up a gene. It may be the change of one nucleotide or large section of the gene.
(reduction division) the process of producing gametes.
cell replication and divisions.
a pair of chromosome having the same gene sequences, each derived from one parent.
chromosomes that is not directly involved in determining sex.
(the letters e.g. Bb) regers to the alleles of an organism.
includes all characteristics of an organism.
the stronger gene. Will be expressed whether it is a homozygous or heterozygous state.
The seaker gene. Will only be expressed when the pair is in the homozygous state.
Pair of alleles that both affect the phenotype when present in a heterozygous state.
particular position on homologous chromosomes of a gene.
having different alleles of a gene.
a heterozygous individual that has one copy of a recessive allele thta causes a genetic disease in individuals that are homozygous for this allele.
occurs when the genes carried on the sex chromosomes, most often on the X-chromosome.
a group of genes whose loci are on the same chromosome.