Genetic Variation
Biology ⇒ Genetics and Heredity
Genetic Variation starts at 9 and continues till grade 12.
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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?
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?
Describe how selective breeding can affect genetic variation.
Describe one way in which mutations can be beneficial.
Describe the difference between genotype and phenotype.
Describe the role of gene flow in genetic variation.
Explain how genetic drift can affect genetic variation in small populations.
Explain how sexual reproduction increases genetic variation.
Explain the difference between continuous and discontinuous variation, giving an example of each.
Explain why genetic variation is important for the survival of a species.
Explain why inbreeding can reduce genetic variation.
Explain why populations with low genetic variation are at greater risk of extinction.
What is genetic variation?
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.
A scientist observes that a certain fish species in a lake has a wide range of scale colors, from light silver to dark gray. Explain how both genetic and environmental factors could contribute to this variation.
Explain why asexual reproduction generally results in less genetic variation compared to sexual reproduction.
A population of lizards is separated by a river, creating two isolated groups. Over many generations, the two groups develop different coloration patterns. Explain how this scenario demonstrates the role of genetic variation in evolution.
A scientist studies two populations of the same plant species. Population A has high genetic variation, while Population B has low genetic variation. If a new disease affects both populations, which population is more likely to survive and why?
Describe how a population bottleneck can affect genetic variation and the long-term survival of a species.
