Identical twins
A. share the same genetic code.
B. are no more alike than other siblings.
C. result from one ovum fertilized by two separate sperm.
D. result from two eggs fertilized by two separate sperm.
A. share the same genetic code.
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Once a thymocyte has productively rearranged a ?-chain gene, which of these event(s) can occur subsequently? (Select all that apply.)
a. ? binds to pT? and is expressed on the cell surface with the CD3 complex and ? chain. b. Rearrangement of ?-, ?-, and ?-chain genes ceases as a result of the suppression of expression of RAG-1 and RAG-2. c. The pre-T cell proliferates and produces a clone of cells all expressing an identical ? chain. d. Expression of CD34 and CD2 gives rise to double-positive thymocytes. e. ?-, ?-, and ?-chain loci rearrange simultaneously.
The amnion contains fluid in which the fetus floats
Indicate whether the statement is true or false
What is the step cadence for the Forestry Step Test and the Queens College Step Test? What are the step heights for men and women?
What will be an ideal response?
What is a non-cancerous abnormal cell called?
A. Mutation B. Metastasis C. Dysplasia D. Oncogenes