What is one example of a phenotypic change that is not genetic?
artificial selection is used to produce birds with purple feathers.
changes occurred in the body shape of invertebrates over time.
humans are larger than they were 100 years ago.
there is an increase in the number of dark moths in a population.

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening