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chapter 2
| Question | Answer |
|---|---|
| Genes | carry instructions to make body function; most basic unit |
| DNA | chemicals substance makes up genes |
| Chromosomes | store and transmit genetic into (46, 23 pairs) |
| Conception | sperm and ovum intie to form zygotes |
| Zygote | single cell organisms containing 46/23 chrmomsomes |
| Allele | 2 forms of the same gene |
| Homozygous | 2 alleles are alike; both parents have blond hair |
| Dominant-recessive inheritance | one of the allele effects the child -Genetic disorders if both parents have gene children are more likely to |
| Incomplete dominance | both alleles have a single gene- results in combined trait |
| Polygenetic inheritance | many genes combine to influence traits |
| Genomic imprinting | chemical marker activates father or mother genes; normally temporary |
| Mutation | sudden permanent change in DNA segment during birth; cancer etc. |
| Chromosomal abnormities | different number of chromosomes or a structural abnormality in one or more chromosomes; |
| causes down syndrome | extra 21st chromosome |
| causes sex chromosomes abnormalities | problem with X and Y chromosomes |
| reproductive choices | genetic counseling- helps couples, testing- trends, adoption |
| reproductive technology | donor insemination, surrogate mom |
| prenatal diagnostic method | amniocentesis, ultra sound, blood analysis |
| environment context for development | family, poverty, neighborhood, culture |
| socioeconomic status | social status |
| Collectivist | people are a part of a group; group goal over individual |
| Heredity | estimates proportion of individual differences take part of genetics |
| Kinship study | study extended family to see traits |
| Passive correlation | parents provide environment based on heredity |
| Evocative correlation | children influence environment |
| Niche picking | pick places where particular genetic tendencies do best; avoid places that conflict with and do not support their tendencies |
| Epigenists | deviation resulting from on going directional changes |
| Age of viability | 22-26 weeks |