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What is the answer Of the chromosomal abnormalities

What is the answer
Of the chromosomal abnormalities

Question Image
Grade:12

1 Answers

Arun
25763 Points
2 years ago
its a simple ques , frst of all erythroblastosis foetails is a disease in which the mothers blood antigen will not recognise the baby as its own and starts killing it , so, its not any kind of chromosomal disorder . 
then down syndrome is trisomy of chromosome no 21 , and colour blindlness related to X chromosome . 
so, option no 3 turns out to be the correct answer 

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