Two true-breeding parents, one who is a Iceberg and Balsamic lover, and the other who is Romaine, Thousand Island lover, are mated. One of the F1 offspring is back-crossed to a Iceberg, Balsamic lover. If the observed counts of each phenotype from 500 F2 offspring are: Ice/Ba Ro/TI Ice/TI Ro/Ba 240 240 10 10 what is the estimated recombination fraction between the two genes?A. Ice/Ba Ro/TI Ice/TI Ro/Ba125 125 125 125B. Ice/Ba Ro/TI Ice/TI Ro/Ba200 100 100 50C. Ice/Ba Ro/TI Ice/TI Ro/Ba205 205 45 45D. Ice/Ba Ro/TI Ice/TI Ro/Ba225 225 25 25E. Ice/Ba Ro/TI Ice/TI Ro/Ba200 200 50 50

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

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions

Approximately what portion of the foods that we eat have been genetically modified in some way? a. fewer than 10% b. about 50% c. nearly 100%