Which layer of soil is least likely to be penetrated by plant roots? a. o (organic matter) b. a (topsoil) c. b (subsoil) d. c (parent rock)

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?