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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 |