CHOOSE THE BEST ANSWER A mother and her two daughters each d…

CHOOSE THE BEST ANSWER A mother and her two daughters each develop breast cancer at approximately the same age in their lives. Based on genetic analysis, it is determined that mutations in the BRCA1,  tumor suppressor gene, is responsible for all three instances of cancer. Their specific mutations are presented below (bold base pair). Mother: ATCGCTCCADaughter A: ATCGCTCCADaughter B: ATCGCTCCA Given these data, what is the most likely origin of each daughter’s cancer? Daughter A’s cancer is [answer1] Daughter B’s cancer is [answer2]

CHOOSE THE BEST ANSWER During DNA replication, our cells use…

CHOOSE THE BEST ANSWER During DNA replication, our cells use the enzyme helicase to “unzip” the two strands that comprise the DNA molecule. To make copies of specific DNA sequences in the lab, scientists use polymerase chain reaction (PCR).  PCR mimics DNA replication in some ways, but not in how the two strands are pulled apart. How are the two strands of DNA unzipped in the lab during PCR? 

CHOOSE THE BEST ANSWER Red-green color blindness in humans i…

CHOOSE THE BEST ANSWER Red-green color blindness in humans is inherited as a recessive X-linked trait. The allele for normal vision is B, and the allele for colorblindness is b. A husband and wife have 2 sons and 2 daughters. One son and one daughter are color blind. What are the genotypes of the parents?