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LSDP
Life Span Developmental Psychology Ch. 2
| Question | Answer |
|---|---|
| A gene that codes with other genes to affect a specific trait (e.g., skin color). | additive gene |
| A structure that supports the amniotic fluid in the uterine cavity and produces the amniotic fluid | amnion |
| The study of the effects of heredity on behavior. | behavior genetics |
| Rod shaped portions of DNA. They are the carrier of genes and one of the 46 molecules of DNA (in 23 pairs) that each cell of the body contains and that, together, contain all human genes. | chromosomes |
| The union of an ovum and a sperm to create the single-celled zygote. | conception |
| The molecular basis of heredity. It determines the nature of every cell in the body and how it will function. It consists of a double helix with parallel strands. | DNA (deoxyribonucleic acid) |
| A trait that is expressed when two competing traits are present. | dominant gene |
| The period from 2–8 weeks following conception. During this stage significant growth occurs in the major organs and body systems. | embryonic stage |
| This stage begins at 8 weeks after conception and continues until birth. | fetal stage |
| A developing child from 8 weeks after conception until birth. | fetus |
| The sex cells of the mother and father that form a new cell at conception | gamete |
| Basic unit for the transmission of genetic information. | gene |
| The full set of chromosomes and all of the genes they contain. This makes up the genetic material of an organism. | genome |
| The underlying combination of genetic material that is present but not outwardly visible in an organism. It is an organism’s entire genetic inheritance or genetic potential. | genotype |
| The first and shortest stage of prenatal development. It takes place during the first 2 weeks following conception. Unlawful to | germinal stage |
| A trait that can be seen. The person’s actual appearance and behavior that are the result of both genetic and environmental influences. | phenotype |
| A conduit between the mother and the fetus that provides nourishment and oxygen via the umbilical cord. | placenta |
| Inherited trait that is influenced by many genes rather than a single gene. | polygenic traits |
| A trait that is within an organism but is not expressed. | recessive gene |
| Factors including agents, conditions, drugs, chemicals, and malnutrition that can negatively impact prenatal development and lead to birth defects and even death. | teratogen |
| The structure composed of two arteries and one vein that connect the placenta to the fetus. | umbilical cord |
| The new cell formed at the time of fertilization. | zygote |
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