alleles phenotypes and genotypes

• An allele is a different version of the same gene
• Genes are segments of DNA that code for specific proteins
• Traits can be determined by single genes or multiple genes that interact with each other
• We inherit two alleles of each gene, one from each parent
• Homozygous means having two of the same alleles for a gene, while heterozygous means having two different alleles
• Dominant alleles are always expressed over recessive alleles
• Genotype refers to the collection of alleles an individual has
• Phenotype refers to the physical characteristics that result from the genotype
• Different genotypes can lead to the same phenotype, while the same genotype can result in different phenotypes