Final Flashcards
What is a mutation?
a different or distinct form or version of something.
What is the function of DNA, RNA, and proteins
DNA & RNA carry genetic information which is read in cells to make the RNA and proteins by which living things function. Allows this information to be copied and passed on to the next generation.
What type of macromolecule are enzymes?
Protein Macromolecules - amino acids
What is a mutagen?
An agent which causes genetic mutation.
What is a chromosome?
nucleic acids and protein found in the nucleus of most living cells, carrying genetic information in the form of genes.
What is the overall purpose of meiosis?
To produce gametes, or sex cells
What does Meiosis do for the organism?
reduces the number of chromosomes in the parent cell by half and produces four gamete cells.
What is an allele?
Forms of a gene that arise by mutation and are found at the same place on a chromosome. (Dominant allege = brown eyes, recessive = blue eyes
How are matings, offspring, siblings, generations, and other relatives represented?
Pedigree
Do individuals evolve or is it populations that evolve?
Populations evolve.
Because individuals in a population vary, some in the population are better able to survive and reproduce given a particular set of environmental conditions.
What is speciation?
The formation of new and distinct species in the course of evolution
How do traits become common in a population?
After just a few generations or after thousands, depending on the circumstances, such traits become common in the population.
How does a population evolve over time?
Natural selection, genetic drift, and gene flow
What do organisms compete for?
food, water and space to live, mates, etc.
What role do mutations play in evolution?
Fuel the variability in populations and thus enable evolutionary change.