If You Have an Identical Twin, You and Your Twin

question 9

Multiple Choice

If you have an identical twin, you and your twin are likely to have

• A) an identical number of B cells, helper T cells, and cytotoxic T cells
• B) identical major histocompatibility complex (MHC) proteins
• C) identical antigens with similar immunogenicity and reactivity
• D) identical antigen presenting cells (APCs)
• E) an identical number of effector and memory cells

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