Genetic Variation
Biology ⇒ Genetics and Heredity
Genetic Variation starts at 9 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Genetic Variation.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 9
A population of beetles has two color forms: green and brown. If a disease kills only green beetles, what happens to genetic variation in the population?
Describe how selective breeding can affect genetic variation.
Describe one way in which mutations can be beneficial.
Describe the difference between genotype and phenotype.
A population of beetles has two color forms: green and brown. If a disease kills only green beetles, what happens to genetic variation in the population?
A population of rabbits has a gene for fur color with two alleles: B (black) and b (white). If the frequency of B is 0.7 and b is 0.3, what is the total allele frequency?
A population of birds has three different beak shapes: short, medium, and long. If a new food source that only birds with long beaks can access becomes available, predict how the frequency of beak shapes might change over time and explain why.
A population of plants is exposed to a new pesticide. Some plants survive and reproduce, while others die. Explain how genetic variation within the population can lead to the evolution of pesticide resistance over several generations.
Which of the following best describes a mutation? (1) A change in the DNA sequence (2) The process of cell division (3) The movement of individuals between populations (4) The combination of gametes
Which of the following increases genetic variation in a population? (1) Inbreeding (2) Random mating (3) Cloning (4) Asexual reproduction
Which of the following is an example of discontinuous variation? (1) Height in humans (2) Blood group in humans (3) Weight in dogs (4) Skin color in humans
Which of the following is an example of gene flow? (1) A bird migrates to a new island and breeds with the local population (2) A plant self-pollinates (3) A mutation occurs in a fish (4) A bacteria divides by binary fission
Fill in the blank: A change in the frequency of alleles in a population over time is called __________.
Fill in the blank: The different forms of a gene are called __________.
Fill in the blank: The exchange of genetic material between homologous chromosomes during meiosis is called __________.
Fill in the blank: The movement of alleles from one population to another is known as __________.
True or False: All genetic variation is visible in an organism's appearance.
True or False: All mutations are harmful to an organism.
True or False: Crossing over during meiosis leads to genetic variation in gametes.
True or False: Environmental factors can influence genetic variation.
