How would the human population be different if crossing over did not happen during meiosis

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

Can a trait be both polygenic and have multiple alleles? explain why or why not.

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.