In what way is the simple model deficient as a representation of DNA?

One group of reptiles, characterized by the fossil ark metal x

Describe your dna model. which part do the straws represent? the pushpins? the paper clips and the black dots you made with the marker?

The table above shows five different types of chromosomal abnormalities that can occur during meiosis. they result in either an individual having too many or too few chromosomes in their genome. what is the most likely cause of these chromosomal abnormalities?