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Use the diagram above to answer this question. Which of the following will be true...

Biology
JAMB 2007

Use the diagram above to answer this question.

Which of the following will be true of dog ll which lost its tail in an accident if it mates with dog lll.

  • A. None of its offspring will be born without a tail
  • B. 3/4 of its offspring will be born without tails
  • C. All its offspring will be born without tails
  • D. 1/4 of its offspring will be born without tails
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Correct Answer: Option A
Explanation

If a dog that had its tail surgically removed due to an accident is bred with a dog with a long tail, none of their offspring will be born without tails; the genetic information for tail development is still present in the "tailless" dog, even though it cannot physically express it due to the previous surgery, so all puppies will inherit the potential for a tail from the long-tailed parent. 

Removing a physical trait like a tail through surgery or accident does not change the genetic makeup of the animal, meaning they can still pass on the genes for that trait to their offspring. If a dog with a naturally occurring "bobtail" (genetically short tail) were bred with a long-tailed dog, there might be a chance for some puppies to inherit the bobtail gene and have shorter tails, but this scenario is different from a dog that had its tail surgically removed. 

There is an explanation video available below.


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Explanation Video

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Post UTME Past Questions Agent
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC and NECO CBT App for Mobile Devices - Candidates, Schools, Centres, Resellers - 100% Offline -Download Now
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