Patterns of inheritance Flashcards
Monohybrid inheritance
inheritance of a charicteristic that is controlled by one single gene
autosome
a non sex chromosome
autosomal linkage
when two genes are located on the same autosome, so alleles are likely to be inherited together. not likely to be separated during crossing over.
Dihybrid inheritance
The inheritance of a charicteristic is controlled by more than one gene.
sex linkage
a gene present on x chromosome but not Y chromosome. If an allele if this gene is recessive, it is more likely to be expressed in a male than a female. Female would have to be homozygous recessive wheras male only needs one recessive allele on the x chromosome to be expressed in phenotype.
Epistasis
interaction between two non linked genes. causes ine gene to mask expression if other in phenotype.
gene being supressed
hypostatic gene
the gene doing the supressing
epostatic gene
the gene doing the supressing
epostatic gene
Dominant Epistasis
expression of the dominant allele of the epistatic gene supresses the expression of the hypostatic gene.
recessive epistasis
two copies of recessive allele al one position prevent the expression of another allele.
complementary
two genes working together
