Phenomenon in which pair of homologous chromosome fails to separate called?
General Science / General Science Class 9 MCQs — Multiple-choice practice
وہ رجحان جس میں ہومولوس کروموسوم کا جوڑا الگ ہونے میں ناکام ہو جاتا ہے جسے _____ کہا جاتا ہے؟
- A. Synapsis
- B. Linkage
- C. Terminalization
- D. Non-disjunction
Correct answer
Non-disjunction
Explanation
Explanation Non-disjunction is the phenomenon where a pair of homologous chromosomes (or a pair of sister chromatids) fails to separate properly during meiosis. Resulting in an abnormal number of chromosomes in the daughter cells. This can lead to genetic abnormalities , such as Down syndrome (trisomy 21), or other chromosomal disorders.
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