B4: Inheritance Flashcards
nucleus contains
genetic material
stored as linear chromosomes
define chromosome
long thread like structure
made of DNA
wrapped around proteins
define gene
short section of a chromosome
which carries the genetic information to code for one protein.
Genes determine an organism’s characteristics
alleles can be
dominant or recessive
define genotypes
alleles that control a characteristic
our genotype can be written as… because…
two letters
two alleles for each gene, each inherited from each parent
define phenotype
visible characteristics of an organism
determined by genes /environment
homozygous
two same alleles of the same gene
heterozygous
two diff alleles of the same gene
which allele determines the phenotype
always dominant present - dominant determines
two recessive - recessive expressed
what is a monohybrid cross
cross between two individuals of species where impact of only a single gene is considered
what is a carrier
dont have genetic condition
but have allele for genetic condition + can pass on allele to next gen
