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.
1 Down syndrome is a relatively common genetic condition. 2  The number of babies being born is rising in many countries. 3  Life expectancy for people with Down syndrome has risen dramatically.  As a result of rising births and improved life expectancy many more people are living today with Down syndrome than ever before.