portion of a chromosome that controls the manufacture of a protein. In effect, this usually controls one trait or characteristic of the organism
different forms of the same gene. Most organisms have two alleles of each gene (this is called diploid and is abbreviated 2n)
an allele that controls the gene, no matter what the other allele is. Dominant alleles are represented by capital letters.
an allele that cannot control the gene unless no dominant allele is there. Recessive alleles are represented by lower case letters.
both alleles are the same in the same gene
the two alleles are different in the same gene
description of the physical or perceptible traits of the organism.
description of the alleles in the genes of the organism.
a cell that only has one allele of a gene, abbreviated "n"
a reproductive cell—sperm or pollen, egg or ovum. These are usually haploid
cell formed by merger of two gametes ("fertilized egg")