Genetic Variation
Biology ⇒ Genetics and Heredity
Genetic Variation starts at 9 and continues till grade 12.
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A population of birds is separated by a mountain range, and over time, the two groups develop different genetic traits. What process is responsible for this genetic divergence?
Describe how artificial selection can affect genetic variation.
Describe how gene flow can affect the genetic variation of a population.
Describe how non-random mating can affect genetic variation in a population.
Describe the difference between genetic drift and natural selection in terms of their effects on genetic variation.
Describe the founder effect and its impact on genetic variation.
Explain how crossing over during meiosis increases genetic variation.
A population of birds is separated by a mountain range, and over time, the two groups develop different genetic traits. What process is responsible for this genetic divergence?
Which of the following best describes a mutation?
(1) A change in the DNA sequence
(2) A change in the environment
(3) A change in behavior
(4) A change in population size
Which of the following best describes a population bottleneck?
(1) A population expands rapidly
(2) A population is reduced to a small size, then recovers
(3) New species are formed
(4) Individuals migrate into a population
Which of the following is a consequence of low genetic variation in a population?
(1) Increased adaptability
(2) Increased risk of extinction
(3) Increased mutation rate
(4) Increased gene flow
Which of the following is an example of a mutagen?
(1) Water
(2) Ultraviolet light
(3) Oxygen
(4) Glucose
Fill in the blank: The exchange of genetic material between non-sister chromatids during meiosis is called __________.
Fill in the blank: The observable characteristics of an organism are known as its __________.
Fill in the blank: The process by which alleles are randomly distributed into gametes is called __________.
Fill in the blank: The process by which homologous chromosomes exchange genetic material during meiosis is called __________.
True or False: All genetic variation is visible in an organism's phenotype.
True or False: All mutations are inherited by the next generation.
True or False: Environmental factors can influence the expression of genetic variation.
True or False: Founder effect is a type of genetic drift.
