Answered

When something goes wrong during meiosis, abnormal conditions happen. In humans, Down’s syndrome is an example of such abnormality. Why do the cells of a person with Down’s syndrome have an extra chromosome? *
A. due to crossing over.
B. due to gene segregation
C. due to nonseparation of body chromosome no. 13
D. due to nonseparation of body chromosome no. 21

Sagot :

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Answer:

The Letter D

Explanation:

The Letter D is the answer because the letter A is due to crossing over and is wrong and letter B is due to gene segregation and is wrong letter C is due to nonseparation of body chromosome no. 13 which is wrong therefore it is the letter D