The flashcards below were created by user
dorsalthorns
on FreezingBlue Flashcards.
-
Monohybrid Cross
- Breeding (i.e. cross-pollination) two varietes that differ for one trait
- i.e. colour of flower
: purple P and white p
-
Alleles
Alternative form of a gene
-
First fillial
First generation (after paretnal generation)
-
Homozygus Dominant
Same alleles, i.e. PP
-
Homozygous Recessive
Same alleles; i.e. pp
-
Heterozygous
- Two different alleles
- i.e. Pp, pP
-
Incomplete dominance (co-dominance)
- Both alleles are expressed
- i.e. Red flower cross-pollinated with white flower becomes pink flower
-
Dihybrid cross
- Breeding two varieties that differ for two traits
- i.e. Colour and shape
-
Multiple alleles
- More than two alleles
- i.e. blood types: IA, IB, i Rh factor R, r
-
Polygenic inheritance
- Many genes code for one phenotype
- Gradietnt of phenotypes
- i.e. skin colour, hair colour, eye colour, intelligence, height
-
Epistasis
When one gene interferes with the expression of another
-
Pleiotropy
- One gene that effects the expression of many different phenotypes
- i.e. one gene that affects both pigmentation and cross-eyedness
-
Test cross
Helps differentiate between homozygous dominant and heterozygous genotypes.
Cross unown genotype with a known homozygous recessive genotype
|
|