Ateacher shows students a string of beads as a model of a chromosome and genes. what do the beads represent explain?

What is thought to have caused the mass extinction at the end of the cretaceous period?

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above

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?