In diploid species like humans, two full sets of chromosomes are present, meaning each individual has two alleles for any given gene. If both alleles are the same, the genotype is referred to as homozygous. If the alleles are different, the genotype is referred to as heterozygous. For every gene, you inherit two alleles: one from your biological father and one from your biological mother. Together, these alleles are called a genotype. If the two versions are different, you. Homozygous and Heterozygous Definition and Examples. Homozygous genotypes= single type of gamete. Heterozygous genotypes= two different types of gametes. The presence of two different alleles at a particular gene locus. A heterozygous genotype may include one normal allele and one mutated allele or two different mutated alleles (compound heterozygote). Text solution Verified Identifying Heterozygous Genotypes A heterozygous genotype has two different alleles for a particular gene, one dominant and one recessive (e.g., Tt). Let's analyze each option: TTRR: Both alleles for each gene are the same (TT and RR), so this is homozygous. Study with Quizlet and memorize flashcards containing terms like Which of these genotypes is heterozygous? (A) AA (B) Bb (C) Cd (D) ee, Which of these is NOT a phenotype? If you have two copies of the same version of a gene, you are homozygous for that gene. If you have two different versions of a gene, you are heterozygous for that gene. The genotype that is heterozygous contains two different alleles for a particular gene. In this case, the genotype Bb consists of one dominant allele (B) and one recessive allele (b), making it heterozygous. Heterozygous refers to having different alleles for a particular trait. If the two versions are different, you have a heterozygous genotype for that gene. The relationship between the two alleles affects which traits are expressed. Heterozygous genotypes occur when two different versions of a gene, known as alleles, appear at the same location on a pair of chromosomes. Heterozygosity plays a key role in dominant-recessive traits and the inheritance patterns of genetic conditions.