THE MOLECULAR BASIS OF INHERITANCE
GENE MUTATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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the expression of certain genes is affected by temperature
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the genes of a fox are made of unstable DNA
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random alteration of DNA can occur on certain chromosomes
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mutations can be caused by temperature extremes
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Detailed explanation-1: -during the warm temperatures of summer, the arctic fox produces enzymes that cause its fur to become reddish-brown. during the cold temperatures of winter, these enzymes do not function. as a result, the fox has a white coat that blends into the snowy background.
Detailed explanation-2: -Over the winter the arctic fox has a heavy white coat, but when early summer temperatures begin to melt the snow cover, the coat is shed for a thinner, two-tone brown pelage. White fur not only provides camouflage in winter but adds warmth.
Detailed explanation-3: -(D) The lower temperatures in winter denature the pigment molecules in the arctic fox coat, causing the coat to become lighter in color.
Detailed explanation-4: -Overview. Human immunodeficiency virus (HIV) disables the body’s immune system until it is no longer capable of fighting infection.