Genetic Variation
Biology ⇒ Genetics and Heredity
Genetic Variation starts at 9 and continues till grade 12.
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A population of beetles has two color forms: green and brown. If a disease kills only green beetles, what will happen to the genetic variation in the population?
Describe how genetic drift can affect genetic variation in small populations.
Describe one way in which sexual reproduction increases genetic variation.
Describe the difference between genotype and phenotype in the context of genetic variation.
Explain how gene flow can introduce new alleles into a population.
Explain how mutations contribute to genetic variation.
A population of beetles has two color forms: green and brown. If a disease kills only green beetles, what will happen to the genetic variation in the population?
A population of rabbits has a gene with two alleles, A and a. If the frequency of A is 0.7, what is the frequency of a?
Which of the following best describes a mutation? (1) A change in the DNA sequence (2) The fusion of gametes (3) The separation of homologous chromosomes (4) The movement of individuals between populations
Which of the following is an example of a beneficial mutation? (1) A mutation causing a disease (2) A mutation increasing resistance to a virus (3) A mutation with no effect (4) A mutation causing sterility
Which of the following is an example of a mutation? (1) A change in eye color due to sunlight (2) A change in DNA sequence (3) A change in diet (4) A change in behavior
Which of the following is an example of gene flow? (1) A mutation in a gene (2) A bird migrating and breeding in a new population (3) Chromosomes crossing over (4) Asexual reproduction
Fill in the blank: A ________ is a version of a gene.
Fill in the blank: A ________ mutation affects only one or a few nucleotides in a gene.
Fill in the blank: The exchange of genetic material between homologous chromosomes during meiosis is called ________.
Fill in the blank: The movement of genes from one population to another is called ________.
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 increases genetic variation.
True or False: Environmental factors can influence the expression of genetic variation.
