Matching Pairs HeredityOnline version Life Science by Melodie Gonzalez [STUDENT] 1 Determined by whether or not a dominant trait is present. 2 Genes that are expressed when a heterozygous genotype is present. 3 Used to determine the probability of outcomes of offspring. 4 The study of heredity, or how certain features pass parents to their offspring 5 Any of the forms of a specific gene that can be present on the same location of a chromosome. 6 A person with both a dominant and recessive alleles. 7 The process by which scientists modify the genome of an organism. 8 Genes that are expressed when homozygous genotypes are present. 9 The trait that is expressed. 10 The characteristics we get genetically from our parents and our relatives before them. 11 Because a person has more genes than expressed, there are many different possible combinations of genes their offspring can have. Punnet Square Variation Of Traits Heterozygous Gene Expression Alleles Genetic Engineering Recessive Traits Phenotype Heredity Genetics Dominant Traits