6. Chromosomal Variation
Chromosomal Rearrangements: Translocations
2:57 minutes
Problem 24a
Textbook Question
Textbook QuestionA boy with Down syndrome (trisomy 21) has 46 chromosomes. His parents and his two older sisters have a normal phenotype, but each has 45 chromosomes.
What is the probability the next child of this couple will have a normal phenotype and have 46 chromosomes? Explain your answer.
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