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