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Keri is beginning to respond to real words, such as "no" and "hi," addresses her parents as "Mama" and "Dada," and is making her first connections between words and objects. Kerri is most likely __________ months old.
5-HTTLPR Gene
A variation in the genetic sequence of the serotonin transporter gene, which is thought to impact the efficiency of serotonin transport and has been associated with susceptibility to depression and anxiety disorders.
Allele
Alternate versions of a gene, which develop through mutation and exist at the same position on a chromosome.
Intervention Study
A research method involving the intentional action or treatment applied to study subjects to observe its effects, often used in medical and psychological studies.
Constructive
Serving a useful and positive purpose, often implying the building up or improvement of something.
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