Braden and Brandon Are Identical Twins

question 340

Multiple Choice

Braden and Brandon are identical twins.When the twins were 10 years old,Braden was in a car accident that left him badly injured.His body recovered,but psychologically he is now filled with anxiety,overly cautious,and always worried about any physical symptoms.What key issue in developmental psychology does the situation with the twins bring forth?

• A) qualitative or quantitative
• B) nature or nurture
• C) cause or effect
• D) critical period or sensitive period

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Definitions:

DNA Ligase

A substance that helps in the combination of DNA molecules by catalyzing a phosphodiester bond.

Cosmid Cloning Vectors

Hybrid plasmid-bacteriophage DNA vectors used in genetic engineering for cloning large DNA fragments.

Restriction Enzyme

A protein produced by bacteria that cleaves DNA at specific sites, widely used in molecular biology for DNA manipulation.

Reverse Transcriptase

An enzyme used by some viruses (including retroviruses like HIV) to transcribe their RNA into DNA, allowing them to integrate into the host genome.