Can some one help me out please

Genes are segments of deoxyribonucleic acid (DNA) that contain the code for a specific protein that functions in one or more types of cells in the body. Chromosomes are structures within cells that contain a person's genes. Genes are contained in chromosomes, which are in the cell nucleus.

If chromosomes are the recipe book than they hold many different types of recipes but if genes are a recipe than its only singular instead of multiple recipes.

Brainliest?

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

c. heat from the poles back down towards the equator.