Morgans research group determined the relative placements of genes on chromosomes based on?

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

Individuals do not compete directly for resources, but are prey for the same predator

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome