Bài 4: Lại hai tuổi giấm thuần chủng thân xám, cánh ngắn và thân đen, cảnh dài, F1 thu được toàn tuổi thân xám, cánh dài. Cho ruồi F1 tạp giao ở F2 thu được 201 ruổi thân xám, cánh ngắn, 299 tuổi thân xám, cánh dài và 200 tuổi thân đen, cánh dài. Cho biết mỗi tỉnh trạng do một gen quy định. Hãy xác định QLDT và viết sơ đồ lại từ P đến F2

Which best describes the scientific process

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

A60-tooth gear is connected to a 72-tooth gear. if the smaller gear turns 12 times, how many turns does the larger gear make?