Alleles and Genotypes
In every living thing, genes play a crucial role, and each gene has two copies. One copy comes from your mother, and the other comes from your father. These different versions of a gene are known as alleles. There are two main types of alleles: dominant and recessive. Dominant alleles are represented by capital letters, like 'B', while recessive alleles are shown with lowercase letters, like 'b'. If you have at least one dominant allele, whether it's in the form of 'BB' (two dominant alleles) or 'Bb' (one dominant and one recessive), you will display the dominant trait. On the other hand, you will only show the recessive trait if you have two recessive alleles, which is represented as 'bb'. The specific combination of alleles you have is called your genotype, and the way you look or the traits you express because of this genotype is known as your phenotype. Understanding these concepts helps us learn how traits are passed down from parents to their children, which is a fundamental part of biology.