Assuming normal disjunction during meiosis, what percentage of offspring would be expected to have down syndrome

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

Describe the layers of the suns atmosphere?

Read the article and use the information to answer the questions that follow discovering the structure of dna explain how the discoveries by rosalind franklin watson and crick build an accurate model of dna done