The agouti gene,when expressed in mice,makes them obese,ravenous,yellow,and prone to diabetes.The agouti phenotype is dominant.During ovulation an agouti mouse is given a drug that methylates (or shuts off the agouti gene).She is then bred to another mouse and gives birth to a litter of baby mice,none of whom have the agouti phenotype.Which of the following is accurate?
A)an epigenetic change in the mother was passed to her offspring
B)her offspring inherit the methylated form of the agouti gene
C)the agouti gene will be inactivated for the entire lives of her offspring
D)all of these are correct

Question

Quizplus · Accepted Answer

The drug methylated the agouti gene in the mother, which was then passed on to her offspring. The methylated form of the gene is inactive, so the offspring do not have the agouti phenotype. The epigenetic change in the mother was passed to her offspring, and the offspring inherit the methylated form of the agouti gene. The agouti gene will be inactivated for the entire lives of her offspring.

The Agouti Gene,when Expressed in Mice,makes Them Obese,ravenous,yellow,and Prone to Diabetes.The