Answer:
The correct answer is: a) down syndrome; heart problems.
Step-by-step explanation:
Down Syndrome is a genetic disorder that is caused by the appearance of an excess chromosome in pair 21 (trisomy 21). This excess chromosome, most of the times, is a result of an error in the meiosis in one of his parent's gametes.
Down Syndrome is much more likely to occur as the age of the mother progresses. This disorder, since it happens because of a BIG excess in genetic material, it has many repercussions all over the body.
Some of the symptoms of Down Syndrome include particular facial features, intellectual disability, and higher risks of heart problems and cancer.