My scientific studies have afforded me great gratification; and I am convinced that it will not be long before the whole world acknowledges the results of my work. -Gregor Mendel
Allele
is one of two or more forms of the DNA sequence of a particular gene. |
codominance
refers to a relationship between two alleles of a gene | . |
Continous Variation
Of a population, a more or less continuous range of small differences in a given trait among its individuals. |
Dihybrid Cross
is a cross between F1 offspring (first generation offspring) of two individuals that differ in two traits of particular interest. |
epistasis
Interaction between the products of two or more gene pairs. |
F1
The offspring of the initial genetic cross. |
F2
The offspring of parents that are the first filial generation from a genetic cross |
Gene
Genotype
Heterozygous
is a unit of heredity in a living organism. |
is the genetic makeup of a cell, an organism, or an individual. |
When cells of diploid organism contain two different alleles of a gene. |
Homozygous Dominant
That it has two dominant alleles. |
Homozygous Recessive
A same trait that is not the stronger trait which is dominant. |
Hybrid Offspring
Offspring of crosses between parents with different traits. |
Incomplete Dominance
Is a form of intermediate inheritance in which one allele for a specific trait is not completely dominant over the other. |
Independent Assortment
States that allele pairs separate independently during the formation of gametes. |
Monohybrid Cross
Is a cross between two parents that breed true for different versions of a single trait. |
Multiple Alelle System
A "variation" of a gene.Genes which have more than two alleles |
Phenotype
Is any observable characteristic or trait of an organism. |
Pleiotropy
Is the condition in which a gene influences the phenotype of more than one part of the body. |
Probability
The chance that each outcome of a given event will occur is proportional to the number of ways the outcome can be reached. |
Punnet-square Method
A way to predict probable outcomes of a genetic cross. |
Segregation
States that allele pairs separate during gamete formation, and randomly unite at fertilization. |
Testcross
A cross between an individual with an unknown genotype and an individual with the homozygous recessive genotype. |
True-breeding lineage
Occurs when offspring inherited identical alleles, generation after generation. |