Meiosis and sexual reproduction allow for highly unique offspring. What are the three sources of genetic variation in either meiosis or sexual reproduction (what is the source, when/where does it occur)? Sexual reproduction is meiosis and fertilization. If this organism self-...
How has evolutionary biology demonstrated that adaptations arise through selection acting on genetic variation? If viruses reproduce asexually and the offspring is genetically identical, how do mutations occur in the next generation? (a) How does sexual reproduction benefit ...
As DNA polymerase copies the DNA sequence, some mistakes occur. For example, one DNA base in a gene might get substituted for another. This is called a mutation (specifically a point mutation) or variation in the gene. Because the genetic code has built-in redundancies, this mistake might ...
Myth 7: Low-affinity binding motifs do not have a strong effect on enhancer function Binding sequences that deviate from the consensus binding motif and are bound in vitro at low affinity are often omitted from analyses. They occur with high frequency by chance in genomic sequences and are th...
As you saw in the previous section, mutations are a random and constant process. As mutations occur, natural selection decides which mutations will live on and which ones will die out. If the mutation is harmful, the mutated organism has a much decreased chance of surviving and reproducing. ...
How do bacteria acquire genetic variation, and how does that differ from the mechanism by which humans acquire variation? How can similar types of genetic mutation occur in different individuals of the same species? Explain why we use both Gi...
At any time, G will have dimension ns, but as alleles are lost or fixed, in the long run adaptation can occur through the whole space of dimension n 44 ns. Thus, evolution is constrained by the total number of sites that could affect the traits, and not by the number segregating at ...
Genomes are sequences of DNA that contain all the genetic instructions needed to build and maintain living things, including humans. The genome is the complete set of genes present in an organism. It contains all hereditary traits and determines what physical and behavioral features an organism wil...
In real life, how much do genetics affect personality traits as compared to environment influence? While genes have potential to modify behavior, behavior can also modify genes. How do genes impact this process? How do genes determine the traits of an organism?
How does meiosis occur? Compare and contrast meiosis and mitosis. How do mitosis and meiosis differ with respect to their purposes? Can both types of cell division take place within one organism? Describe the major differences between Meiosis I and Meiosis II. Expla...