D should be correct....
hopefully this helps you.
Answer:
If the paired chromosomes fail to separate during meiosis in the female, then the resulting daughter cells will receive either 2 or no copies of chromosome 21. If the resulting egg with 2 copies of chromosome 21 is fertilized with a normal sperm, the resulting zygote with be trisomy 21
Explanation:
They appear larger than they really are.
Answer:
When half of the shape is black it means the person is a carrier. When the whole shape is black this means the person has the disorder.
d.100%
Hope this helps
