Traits are passed in discrete units from parent to offspring.
-dominance
dominance
Mendel believed in the principle of separation. This occurs during the formation of gametes and the pair of genes that control a trait separate.
Two alleles for a trait separate when gametes are formed.
The link below will help you get started with this question. There are many terms:
Genes determine what gender you are, what hair color you have, what eye color, how tall you are... For more infornmation on how genes were discovered Google Gregor Mendel.
A trait controlled by many genes
dominance
Mendel believed in the principle of separation. This occurs during the formation of gametes and the pair of genes that control a trait separate.
Mendel's Law Of Segregation
Hybrid
invisible "factors" - now called genes.
these are selected on the gene locus on a DNA.
One gene controlled one trait within Mendel's study, but the sickle cell anemia effects more than one trait.
Two alleles for a trait separate when gametes are formed.
Dihybrid crosses
dihybrid crosses
Mendel called the trait that was always expressed the dominant trait.
For him they were just discrete physical units of inheritance. Johanson coined the term "gene" and people started calling them genes. Today for us these factors are parts of DNA, the base sequences that carry the biological information to determine a trait. Mendel factors are alleles of genes.