A phenotypic ratio of 9:4:3 is indicative of . A. Codominance
B. Polygenic inheritance
C. Epistasis
D. Multiple alleles

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;

you can't see the options

weathering - colorado river carves land in arizona to form the grand canyon. cracks form in a sandstone wall surrounding a house. a marble statue near the science museum is changing color due to rainfall

erosion - after a rainstorm, soil and rock piees litter the roadways. the sand dunes in the sahara desert are changing shape.

here's your answer.

c is the answer to this question. altitude affects the weather because air molecules evaporate.