What biochemical reactions are altered due to Down syndrome? Then how do those biochemical changes affect a person on a phenotypic level

Which is required for sexual fissiondiploid cell productionmeiosis

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?