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Which of the following is the best explanation for a child who is phenotypically short...

Biology
JAMB 2005

Which of the following is the best explanation for a child who is phenotypically short and born of two tall parents

  • A. The father possesses a gene for shortness
  • B. The mother posesses a gene for shortness
  • C. Nature makes the child short
  • D. Both parents possess gene for shortness
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Correct Answer: Option D
Explanation

Two tall parents can have a phenotypically short child if both parents carry a recessive gene for shortness, even though they themselves are tall, and the child inherits two copies of that recessive gene, one from each parent. 

While genetics play a significant role in determining height, it's not controlled by a single gene, but rather by multiple genes and their interactions. If we use the letters "T" for tall and "t" for short, the parents would be "Tt". The child could have TT (tall), Tt (tall), tT (tall) or tt (short). 

Kindly note that although genetics are a major factor, other factors like nutrition, hormones, and medical conditions can also influence a child's height. 

There is an explanation video available below.


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Explanation Video

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