In which cells do erasure and re-establishment of imprinting marks typically NOT occur?
A. Nurse cells
B. Sperm cells
C. Oocytes
D. Somatic cells
D
You might also like to view...
At an atmospheric pressure of 870 mm Hg with 21 percent oxygen, the partial pressure of oxygen is _____
A) 100 mm Hg B) 127 mm Hg C) 151 mm Hg D) 182 mm Hg E) 219 mm Hg
Answer the following statements true (T) or false (F)
1. If a researcher determines that 25% of a liver cell's total genome encodes genes for metabolic enzymes, then he/she should assume that metabolic enzymes make up 25% of the total protein composition of the cell. 2. Liver and muscle cells have different sets of genes. 3. A single pre-mRNA can be alternatively spliced into more than one type of mRNA. 4. If an acetyl group is added post-translationally to a protein, it can be subsequently removed.
The nucleotide sequence encoded in a gene defines the ____ that make up proteins
a. phosphate groups b. polypeptides c. ribosomes d. haplotypes e. amino acids
Let Y1i be the output for factory i when it receives a new machine, and let Y0i be the output for factory i when it does not receive a new machine. Also let Yi be the realized output for factory i and let Di be a binary variable that equals one if factory i actually received a new machine. If the company's headquarters randomly assigns new machines to a subset of the company's factories, this ensures:
A. E(Yi|Di = 0) - E(Yi|Di = 1) = E(Y1i - Y0i) B. E(Yi|Di = 1) - E(Yi|Di = 0) = E(Y1i - Y0i) C. E(Yi|Di = 1) = E(Yi|Di = 0) D. E(Yi|Di = 1) = E(Y1i - Y0i)