Alternate forms of a gene
The visible expression of the genetic makeup of an organism
Most commonly used organism in genetics experiments
Term used to describe the genotype of an individual that has inherited 2 different alleles for a trait
Chart that shows all the possible offspring genotypes for a cross
Term used to describe the genotype of an individual that has inherited two of the same alleles for a particular trait.
The chance that any given event will occur
The genetic makeup of an organism: usually represented by 2 letters
A cross that follows only one trait
A cross that follows two traits at the same time
The scientist who was the first to establish the basic rules of heredity: "Father of Genetics"
The crossing of three traits at a time.
The trait that is hidden by its contrasting version.
The trait that can mask the presence of its contrasting version
The organism used by Gregor Mendel to establish the rules that govern inheritance.
The diploid cell that results from the fusion of reproductive cells; the product of syngamy
Symbol for First Filial Generation
Symbol for Second Filial Generation
Symbol for Parental Generation
Symbol for "genotype ratio"
Symbol for "phenotype ratio"
3 Dominant : 1 Recessive
Phenotype ratio for a true monohybrid cross
Method used to find the GR and PR of a trihybrid cross
Double distribution technique used to figure out the gametes possible for a dihybrid genotype
1 Homozygous dominant: 2 Heterozygous: 1 Homozygous recessive
Genotype ratio for a true monohybrid cross
Law of Independent Assortment
Mendel's law stating that each allele pair segregates independently during gamete formation; applies when genes for two characteristics are located on different pairs of homologous chromosomes.
Law of Segregation
Mendel's law which states that every individual has two alleles of each gene and when gametes are produced during meiosis, each gamete receives one of these alleles
Law of Dominance and Recessiveness
Mendel's law that states some traits mask the presence of other traits (dominant and recessive traits)
any chromosome that is not a sex chromosome
A type of inheritance pattern where the heterozygote simultaneously displays the phenotypes of each allele (not a mix). Neither allele is dominant over the other but both are fully expressed.
A type of inheritance in which two contrasting alleles contribute to the individual a trait not exactly like either parent; blending inheritance. Neither allele is dominant but are only partially expressed.
a mature sexual reproductive cell having a single set of unpaired chromosomes (haploid)
sequence of DNA that codes for a protein and thus determines a trait
the branch of biology that studies heredity and variation in organisms
an organism that has two different alleles for a trait; another term for heterozygous
an organism that has two alleles that are the same; another term for homozygous
one of the 23 pairs of chromosomes in the human, contains genes that will determine the sex of the individual; X and Y
sex linked trait
a trait that is coded for by an allele on a sex chromosome; usually X and will show different inheritance patterns between males and females.
Thomas Hunt Morgan
Bred fruit flies, and supported the the theory of chromosomal inheritance by finding that a specific gene is carried on a specific chromosome