Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
-inherited character and determined by factors (now called genes)
-these factors occur in pairs (genes on maternal and paternal homologous chromosomes) -when gametes form, these genes segregate so that only one of the homologous pair is contained in the gamete |
particulate theory
|
|
inherited characters are determined by particular factors
|
Law of Segregation
|
|
genes on nonhomologous chromosomes will be distributed randomly into gametes
|
Law of Independent Assortment
|
|
heredity unit on a chromosome
|
gene
|
|
-gene has alternate states called___
-contributed by parents -____for a particular gene occurs in pairs |
alleles
|
|
alleles that mask the expression of other alleles, but are themselves expressed
|
dominant
|
|
alleles whose expression is masked by dominant alleles
|
recessive
|
|
physical appearance of a trait
|
phenotype
|
|
includes all alleles present in the cell
|
genotype
|
|
paired alleles are identical
|
homozygous
|
|
pair of different alleles
|
heterozygous
|
|
first generation of offspring
|
first filial, F1 generation
|
|
heterozygous genotype results in an intermediate phenotype
|
incomplete dominance
|
|
inheriting a gene that kills the offspring
|
lethal inheritance
|
|
blood type of humans is an example of
|
codominance
|
|
blood groups are determined by the presence of compounds called ____ on surfaces of red blood cells
|
antigens
|
|
positive and negative characteristic of blood
|
Rh factor
|
|
human traits determined by a single gene
|
widow's peak
bent little finger albinism pigmented iris attached earlobes hitchhiker's thumb interlacing fingers PTC tasting mid-digital hair dimpled chin six finger |
|
diseases determined by a single gene
|
cystic fibrosis
galactosemia phenylketonuria (PKU) juvenile retinoblastoma huntington's disease |
|
provide a way of inserting foreign DNA into a host cell's chromosome
|
transposons
|