Overview: Viruses are very basic organisms that are on the border between living and nonliving things. When they are dormant, they are similar to crystals. They are only able to…
read moreOverview of Human Heredity Genetic traits in human beings come about through a variety of pathways. Some are caused by a single gene, while others come from multiple genes working…
read moreOverview: What Are Twins? Twin births, in which a single pregnancy results in two fetuses, are the most common form of multiple births. Most of the time, human babies are born…
read moreOverview: The Role of DNA DNA directs the synthesis of proteins in cells, whether they ultimately form cellular structure or control chemical reactions as enzymes. The process takes place in…
read moreOverview: What Is DNA? Genes are made of DNA, short for deoxyribonucleic acid. It is a very long molecule made of the nitrogen-carrying bases adenine, guanine, thymine, and cytosine, phosphates,…
read moreOverview: What Is Genetic Behavior? Morgan’s discovery of gender-linked traits was further evidence that genes were located on chromosomes. However, other research indicated that the behavior of genes during meiosis…
read moreOverview: What Is the Chromosome Theory? The results of Mendel’s experiments on cross-breeding pea plants led to principles of heredity, but he wasn’t able to observe either chromosomes or genes…
read moreOverview: What Are Mutations? Although the process of DNA transmission and replication is usually flawless in the next generation of cells, sometimes there are coding errors. These errors pass on…
read moreOverview: Chance and Probability Geneticists use the principles of chance and probability to express the results of genetic experiments with pea plants, as well as other plants and animals. In…
read moreOverview: What Were Mendel’s Experiments? Mendel conducted experiments with simple garden pea plants in order to study plant breeding. His experiments were so successful because the plants grew quickly and…
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