Matching Pairs Mendel Genetics (D)Online version His research showed that traits are inherited as discrete units. He came up with two important laws in genetics. What do you know about his work to get your clue? by Natasha Hawkins 1 The physical characteristic, or traits that is expressed (Tall, Short) 2 States that organisms inherit 2 copes of each gene, one from each parent and that during the formation of games the two copies of each gene separate. 3 refers to the genetic makeup of a specific set of genes (TT, Tt, tt) 4 Allele that is expressed when two different alleles are present (T) 5 Heterozygous genotype 6 allele that is expressed only when two copies are present (t) 7 Considered the father of Genetics 8 Homozygous genotype Recessive (3) Law of Segregation Phenotype (7) TT (8) Dominant Genotype Mendel (1) Tt (2)