Term
|
Definition
| a heritable feature that varies among individuals |
|
|
Term
|
Definition
| each variant for a character |
|
|
Term
|
Definition
| the crossing of two true breeding varieties |
|
|
Term
|
Definition
| the two alleles from a heritable character segregate during gamete formation and end up in different gametes |
|
|
Term
|
Definition
alternative versions of genes account for variantion in inherited characteristics
for each charater an organism inherits two alleles on from each parent
if the two allels at a locus differ the dominant allele determines the phenotype, the recessive allele is raely shown |
|
|
Term
| law of independent assortment |
|
Definition
| each pair of alleles segregates independantely of each other pair of alleles during gamete formation |
|
|
Term
| how to solve a genetics problem |
|
Definition
| comsider each trait separately then multiply together |
|
|
Term
|
Definition
| phenotypes of heterozygote adn the dominant homozygote are undistiguishable |
|
|
Term
|
Definition
| heteroxygotes have less __than the dominant homozygote but more than the recessive homozygote |
|
|
Term
|
Definition
| two alleles both affect the phenotype inseparate distinguishable ways |
|
|
Term
|
Definition
| when genes exist in more than two allelic forms |
|
|
Term
|
Definition
| when a gene has more than one phenotypic effect |
|
|
Term
|
Definition
| gene at one locus alters phenotypic expression of gene at second locus |
|
|
Term
|
Definition
| an additive effect fo two or more genes on a single phenotypic character |
|
|
Term
|
Definition
| characters that vary in the population along a continuum |
|
|
Term
|
Definition
| a family tree describing the traits fo parents and children across the generations |
|
|
Term
|
Definition
| genetic component plus a signigicant environmental component that contributes to a disease |
|
|
Term
|
Definition
| testing done on a fetus at 14 to 18 weeks by inserting a needle into the uterus |
|
|
Term
| chorionic villus sampling |
|
Definition
| done in 8 to 10 weeks, tube inserted through cervix and sample taken of placenta |
|
|
Term
|
Definition
| needle thin tube with viewing scope and fiber optics is inserted into uterus |
|
|
