Focus on macro-molecules including nucleic acids, proteins, lipids, and carbohydrates. A video explains which are monomers, which form polymers, and the process of changing from one to the other. It also covers the characteristics of...

Young scientists generally love to learn how certain traits can be explained by a direct combination of alleles from their parents. Here, they can examine how a phenotype is often expressed when one allele is recessive and the other is...