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Pathology Questions

Explore questions in the Pathology category that you can ask Spark.E!

Why are individuals with an extra chromosome 21, which causes Down syndrome, more numerous than individuals with an extra chromosome 3 or chromosome 16? a) Extra copies of the other somatic chromosomes are probably fatal. b) There are probably more genes on chromosome 21 than on either chromosomes 3 or 16. c) Nondisjunction of chromosomes 3 and 16 probably occurs more frequently. d) Down syndrome results in more serious symptoms than either trisomy 3 or trisomy 16.

During meiosis, homologous chromosomes sometimes "stick together" and do not separate properly. This phenomenon is known as _____. a) nondisjunction b) sticky chiasmata c) meiotic failure d) gametic infertility

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