12. Endangered species, such as the great panda, are species with decreasing populations that are at risk of extinction which fact would most likely contribute to the great pandas high risk of extinction? SC 7L. 15.3
A. Pandas do not hibernate.
3. Pandas have a single food source.
C. Pandas raise their cubs alone.
D. Pandas have very few natural predators.

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.