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 11
A population of 100 individuals has two alleles for a gene: A and a. If 60 individuals are AA, 30 are Aa, and 10 are aa, what is the frequency of allele a?
Define genetic drift.
Describe how gene flow can increase genetic variation in a population.
Describe how random fertilization contributes to genetic variation.
Describe one way in which genetic drift can reduce genetic variation in a population.
Describe the role of independent assortment in generating genetic variation.
Explain how crossing over during meiosis increases genetic variation.
Explain how mutations can be beneficial, neutral, or harmful.
Explain the difference between genetic variation and phenotypic variation.
Explain the difference between somatic and germline mutations in terms of genetic variation.
Explain why genetic variation is important for the survival of a species.
Explain why small populations are more susceptible to genetic drift.
A certain gene in a population has three alleles: A, B, and C. If the frequencies of these alleles are 0.5, 0.3, and 0.2 respectively, calculate the expected frequency of the heterozygous genotype AB under Hardy-Weinberg equilibrium.
A population of 200 individuals has the following genotype distribution for a gene with two alleles, D and d: 72 DD, 96 Dd, and 32 dd. Calculate the allele frequencies of D and d.
Describe how balancing selection can maintain genetic variation within a population. Provide an example to support your explanation.
Explain how a population bottleneck can affect the genetic diversity of a population over several generations. Include the potential long-term evolutionary consequences.
Explain the difference between genetic variation within a population and genetic variation between populations. Why is it important to distinguish between these two types?
Explain why genetic variation is often higher in sexually reproducing populations compared to asexually reproducing populations.
In a certain plant species, flower color is determined by a single gene with two alleles: R (red) and r (white). If the frequency of the r allele is 0.4, what is the expected frequency of homozygous white-flowered plants under Hardy-Weinberg equilibrium?
