12. Meiosis
Genetic Variation During Meiosis
1:11 minutes
Problem 11
Textbook Question
Textbook QuestionWhy are individuals with an extra chromosome 21, which causes Down syndrome, more numerous than individuals with an extra chromosome 3 or chromosome 16? a. There are probably more genes on chromosome 21 than on the others. b. Chromosome 21 is a sex chromosome and chromosomes 3 and 16 are not. c. Down syndrome is not more common, just more serious. d. Extra copies of the other chromosomes are probably fatal.
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