UNIT 2: VARIATIONS IN GENE EXPRESSION
traits that are governed by genes and has distinct differences
QUALITATIVE TRAITS
traits that are governed by environmental factors and genes
QUANTITATIVE GENES
it interplays beyween genetic make up and environmental factors
PHENOTYPIC VARIANCE
it is the degree of expression and are dependent on penetrance
EXPRESSIVITY
if the allele is present, the allele is expressed, then the allele is penetrant. what is it?
PENETRANCE
what do you call the 100% pf all individuals with the same allele in their genotype expresses the trait
COMPLETE PENETRANCE
it is when not 100% of the individuals express the trait
INCOMPLETE PENETRANCE
it is due to environmental factors and non-genetic
PHENOCOPY
differentiate concordnace and discordance
CONCORDANCE PAG BOTH MONOZYGOTIC TWINS EXHIBITS THE TRAIT
DISCORDANCE IS PAG ISA LANG SA MONOZYGOTIC TWINS YUNG NAG EXHIBIT NG TRAIT
in the inheritance of quantitative traits, each allele of each gene interacts additiveky and contribute in the expression of the trait
POLYGENES
these are regions of the DNA that contributes to the quantitative trait and is located in different chromosomes
QUANTITATIVE TRAIT LOCI
these are protein coding regions
GENES
these are not genes but also contribute to the trait
REGULATORY REGIONS