Autosome: Any chromosome other
than the sex chromosome.
Agglutination: Generally refers to the clumping of red
Carrier: A heterozygous individual who is phenotypically normal but carries a recessive gene, which
can be transmitted to his offspring.
Dominant: Phenotypic expression of a gene in both
homozygous and heterozygous conditions.
Homozygous: Having identical alleles. For example, (TT
or tt) at the corresponding gene loci on homologous
Heterozygous: Having two different alleles. For example,
(T, t) at the corresponding gene loci on homologous chromosomes.
Heterogamesis: The process by which
two dissimilar gametes are produced from one of the two sexes.
Linkage: The tendency of two or more genes to remain
together on the same chromosome during the course of inheritance.
Sex Chromosomes: Chromosomes that determine the sex of an
Recessive: Incapable of phenotypic expression unless
both the members of a pair of homologous chromosomes carry the responsible
Autosomes: The chromosomes
which do not determine the sex of an organism.