Matching Pairs Mendel GeneticsOnline 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 Deanna Squire Squire 1 Considered the father of Genetics 2 Allele that is expressed when two different alleles are present (T) 3 The physical characteristic, or traits that is expressed (Tall, Short) 4 Homozygous genotype 5 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. 6 allele that is expressed only when two copies are present (t) 7 Heterozygous genotype 8 refers to the genetic makeup of a specific set of genes (TT, Tt, tt) Genotype Recessive (3) Tt (2) TT (8) Mendel (1) Law of Segregation Dominant Phenotype (7)