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TEKS HS Biology - BIOL.6D Gene Expression

Quiz by Texas Education Agency

High School
Biology (2017)
Texas Essential Knowledge and Skills (TEKS)

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5 questions
Show answers
  • Q1
    In 1917 the biologist Thomas Hunt Morgan conducted studies in which he kept some caterpillars in the dark and placed some others under red, green, or blue lights. Exposure to red light produced butterflies with brightly colored wings. Exposure to green light resulted in dark-colored wings. Exposure to blue light or no light resulted in pale-colored wings. What was the most likely conclusion of Morgan's research?
    Caterpillars exposed to red and green light are healthier than caterpillars exposed to no light or blue light
    The pigment in butterfly wings absorbs light from the environment
    The genes regulating wing color in butterflies are influenced by environmental factors
    The phenotypic expression of wing shape depends on color pigmentation in butterflies
    60s
    BIOL.6d
  • Q2
    At birth Himalayan rabbits are usually white over their entire bodies. But when parts of their bodies reach temperatures below 35°C, a pigment that causes these parts to turn black is produced. Which of the following is most likely the cause of this phenomenon?
    Poor blood circulation
    A trait that is both sex-linked and hormone-dependent
    Infection caused by cold temperatures
    Gene expression that is regulated by temperature
    60s
    BIOL.6d
  • Q3
    Human bone, muscle, and nerve cells all contain the same number of chromosomes with the same complement of genes. What enables these cells to perform specialized activities?
    The ability of some cells to remove unnecessary DNA sequences
    The use of different methods of cell division
    The regulation of gene expression within each cell type
    The mutation of genes within each cell type
    60s
    BIOL.6d
  • Q4
    The arctic fox inhabits northern areas of North America. The same arctic fox is shown in the drawing at different times of the year. What causes this change in fur color?
    Question Image
    Gene expression for fur color is regulated by temperature
    The arctic fox has two traits for fur color that are determined at birth
    Gene expression for fur color is regulated by latitude
    The alleles for fur color change as the arctic fox grows older
    60s
    BIOL.6d
  • Q5
    The Himalayan rabbit's habitat has cold, snowy winters and mild summers. The body is typically covered in white fur except for the nose, feet, tail, and ears, which are covered in black fur. A scientist shaved an area of white fur on the back of a Himalayan rabbit and placed an ice pack over the shaved area. The shaved area grew black fur. Which of these best explains why the hair that grew back where the ice pack was placed was black and not white?
    Question Image
    The genes for black hair were activated by specific temperatures.The white hair mutated to black hair as the rabbit's body temperature decreased.
    The white hair mutated to black hair as the rabbit's body temperature decreased.
    The coat color changed from white to black with the age of the rabbit.
    White hair only grows during certain times of the year.
    60s
    BIOL.6d

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