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In: Biology

the majority of down syndrome cases are a result of maternal gamete carrying an abnormal number...

the majority of down syndrome cases are a result of maternal gamete carrying an abnormal number of chromosomes

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Expert Solution

Majority of down syndrome cases are a result of maternal gamete carrying an additional copy of chromosome 21.

In less than 5 % of cases,the extra copy of chromosome 21 comes from father through sperm.

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