Characteristics and Examples of Fossil Formation. The many different ways organisms are preserved gives fossils different characteristics. Let's explore a few ways fossils can form. Permineralization is when an organism dies and sediment enters the body, filling in the pores of a leaf, or a bone or a shell.
As you can see, for 2 people with Down syndrome having babies, the chances are as follows: -25% chance their child will be typical (no Down syndrome). -50% chance their baby will have Down syndrome. -25% chance there will be no viable pregnancy.
Around one in every 1,000 babies born has Down's syndrome, an incurable genetic disorder caused by the presence of an extra chromosome. Its physical effects include a characteristic flat face and slanting eyes, short stature, heart defects, and poor sight and hearing.