Lifespan Development

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Prenatal Development

Last updated 8:18 PM on 6/15/26
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8 Terms

1
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Which prenatal stage is most vulnerable to teratogens?

Embryonic stage (weeks 3-8)

2
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Which prenatal stage lasts the longest?

Fetal stage

3
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What prevents spina bifida?

Folic acid

4
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What causes Down syndrome?

An extra chromosome 21

5
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What is the difference between genotype and phenotype?

Genotype refers to the genetic makeup of an individual, while phenotype is the observable physical and behavioral traits resulting from the interaction of the genotype with the environment.

6
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Which twins share nearly identical DNA?

Monozygotic (identical) twins

7
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What are the three prenatal stages in order?

Germinal→ Embryonic → Fetal.

8
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What are the three stages of childbirth in order?

Labor → Delivery → Placenta delivery.