The HEXA gene codes for a protein that breaks down and recycles toxic substances in our brain and spinal cord. Mutations in the HEXA gene lead to Tay-Sachs disease. This is a disorder in which the level of toxic substances builds in the brain and spinal cord, leading to severe brain damage and eventually death. In many patients with Tay-Sachs, an insertion of four base pairs is seen in the HEXA gene. In general terms, explain how this insertion impacts the protein that is produced

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

The theories on the expansion of galaxies maybe re-examined to strengthen science should not be tested to strengthen science will weaken scientific knowledge if they change will become laws if they don't change

In pea plants, the allele for inflated pod seed, i, is dominant over the allele for constricted pod seed, i. the punnett square shows a cross for this trait. which offspring will be homozygous dominant