In a certain species of cactus the cactus plant can be covered in Y shaped spines or X shaped spines. When crossing a cactus with Y shaped spines with a cactus with X shaped spines, some of the offspring had both Y shaped spines and X shaped spines. What type of inheritance has occurred in this scenario? * A) Codominance
B) multiple alleles
C) Incomplete dominance
D) Sex-linked inheritance

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explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.