stuff Flashcards
(22 cards)
dihybrid test cross ratio
1:1:1:1
complementary gene action ratio
9:7
recessive epistasis ratio
9:3:4
supression ratio
13:3
dominant epistatis ratio
12:3:1
rebundancy ratio
15:1
ratio of dihybrid selfing F2 progeny
9:3:3:1
conjugation
the union of bacterial cells during which genetic information is trasnferred frm donor (F+ or Hfr) to recipient (F-)
Hfr (high frequency of recombination)
a bacterial cell in which the F factor is integrated into the chromosome; during conjugation, the F factor acts as the origin of chromosomal transfer
F (fertility) factor
bacterial episome (present on plasmid or chromosome) which allows a bacterial cell to be the donor during conjugation
exconjugate
a bacterium that has undergone conjugation
exogenote
the exogenous donor chromosome
endogenote
the endogenous recipient chromosome
merozygote
a cell which is a partial diploid, containing both an endogenote and exogenote
origin of transfer
the fixed point from which DNA transfer begins during conjugation
transformation
intro of foreign DNA transfer begins during conjugation
bacteriophage
“bacteria eater” a virus that infects bacteria
lytic cycle
a mode of infection in which the bacteriophage genome enters the bacterium, replicates, lyses the cell, and progeny are released
virulent bacteriophage
a bacteriophage which always completes the lytic cycle upon infection (unable to become a prophage)
prophage
a phage genome which is integrated into a backerial chromosome
lysogenic
the state of a bacterial cell that has a prophage integrated into its chromosome
lysogenic bacterium (lysogen
