What is the basic problem with cloning adult animals?
a. obtaining enough DNA
b. finding proper surrogates to carry the cloned embryos
c. reprogramming the DNA
d. obtaining DNA without mutations
e. autoimmune rejection of the embryo by the surrogate
ANSWER: c
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Rosalind Franklin used what method to understand the structure of DNA?
a. polymerase chain reaction b. gel electrophoresis c. X-ray diffraction d. high-throughput sequencing
During gamete formation at the end of telophase I, the ploidy of the daughter cells is ________, and each chromosome consists of ________ chromatid(s)
Fill in the blank(s) with correct word
Refer to Figure 51-3. The amnion is identified by number:a
1. b. 2. c. 3. d. 4. e. 5.
The gene PD-1 plays an important role in immune response to tumor cells. How would using gene editing to knock out this gene help T cells recognize and kill cancer cells?
A) PD-1 will be expressed in the cytosol of the cancer cell. This protects PD-1 from the T cell. B) PD-1 will be expressed in the cytosol of the T cell. This protects PD-1 from cancer cells. C) PD-1 will not be expressed on the cancer cell surface. This prevents T cell recognition. D) PD-1 will not be expressed on the T cell surface. This circumvents one line of the cancer cells defense.