Mendelian+Genetics

Postulate 1 is the law of genes. This law states that genetic characteristics are controlled by genes that exist in pairs in individual organisms.

Postulate 2 is the law of dominance. This law states that when two unlike factors for a single trait are present, one factor is considered to be dominant and the other factor is recessive. The dominant one is expressed while the recessive trait is "hidden."

Postulate 3 is the law of segregation. This law states that when gametes are forming, the two alleles that are responsible for a certain trait separate from each other. This way each gamete receives one allele or the other. These traits then come back together at fertilization. This is when the genotype of the offspring is produced.

Postulate 4 is the law of independent assortment. This law states that when gametes are forming, the separating pairs of alleles segregate without respect to the other allelic pair. This means the traits are distribted independently of each other.