Question

MEDALS AND FAN!

Using your knowledge of meiosis and the formation of gametes, consider the following information. Down syndrome is caused by nondisjunction of chromosome pair 21. If a person with Down syndrome has a child with a person who does not have Down syndrome, what is the probability that the child will have Down syndrome?

50 percent

0 percent

100 percent

75 percent

Answer 1

@agent0smith

Answer 2

The majority of Down syndrome is not inherited. Knowing this, I think it would be a 50/50 chance. It's definitely not a 0 percent or 100 percent chance. Yu could try making a punnet square to figure out if it would be 50 or 75, but I think it's 50.

Answer 3

You*

Answer 4

Thanks! That's what I thought.