Alleles are used by cells to make proteins. When an allele changes, the protein that the cell makes also changes. The new alleles cause the cell to make new proteins. Normal Makes Allele Protein Mutated Makes Allele Protein How do you think new proteins affect the fitness of children? A. They have no effect on fitness
B. They increase fitness
C. They decrease fitness
D. All of the above

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.

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when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

explanation:

okay now i don't know this but for the pints nothing else to say bye