Traits that are determined by a single gene are of five main types: y-linked, x-linked dominant, x-linked recessive, autosomal dominant, and autosomal recessive. how many of these modes of inheritance are possible for this pedigree? assume the gene is completely penetrant, and there is no new mutations.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Energy stored in the bonds that hold together the atoms and molecules of all substances is called a. kinetic energy. b. electrical energy. c. mechanical energy. d. chemical energy.

How are primary producers important to the alligator's energy supply