For some traits, you’ll be able to trace that inheritance pattern of the associated genes through your family.
Forward the article to family members so they can do the same. Print off this article, and mark which characteristics you have. If the trait is absent, the corresponding genotype is recessive.Īt the end of the description of each trait, is an area where you can check off whether you are dominant or recessive for that trait. All of the following are dominant traits, meaning that if the trait described is present, it is the dominant phenotype. One can either possess the dominant phenotype or the recessive phenotype. The characteristics listed below are products of simple inheritance. * Examples of Simple Inheritance of Traits that Show Complete Dominance * If you have blue eyes, you had to have inherited a recessive, blue eye allele from both parents. It is kind of like the game Rock, Paper, Scissors, but in this case, brown beats blue.
Your mother’s blue eyes are a recessive trait, and although you have an allele for blue eyes, the dark eye allele that you received from your father mask the expression of the blue eye, recessive allele. Recessive alleles are only expressed if you inherit two of them, one from each parent.įor example, if your father has brown eyes and your mother has blue eyes, you may have ended up with brown eyes. This is a case of a dominant allele masking the expression of a recessive allele. In some instances, the version of a gene that you get from one parent may block the expression of the version of that same gene you received from the other parent. * Some Genes Mask the Expression of Other Genes * The genotype determines the actual traits (called the phenotype) that you have such as eye color, nearsightedness, and whether or not you have dimples. The combination of these pairs of genes that you’ve inherited is called your genotype. You are a diploid organism, meaning that you received one set of genes (called alleles) from your father and the other set of alleles from your mother. * Genes from Mom and Dad Determine Your Traits * The most fun way to learn a little about genetics is to understand heredity first hand, your own heredity and you can do this by examining the actual dominant and recessive traits that you possess.
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