Recombination and plasmids

Question 1

At what stage does crossing over occur for recombination, what 2 other ways does recombination occur in sexual reproducing organisms

Answer 1

Meiosis
Recombined duplexes are randomly assorted into gametes
Gametes will then merge with other gametes of the opposite parentage

Question 2

The three types of asexual reproduction recombination

Answer 2

Conjugation
Transduction
Transformation

Question 3

Recombination with filamentous bridges where genetic information moves from one cel to the other (must be touching)

Answer 3

Conjugation

Question 4

Genetic information can be carried from F+ to F- but not from F- to F+, this demonstrates that F+ has a

Answer 4

Fertility factor

Question 5

Transmission of DNA carried by viruses from one cell to another, usually by bacteriophages

Answer 5

Transduction

Question 6

Basis of modern day recombinant technology, transfer of DNA without a conjugate bridge or virus,

Answer 6

Transformation

Question 7

Prevention of transformation can be achieved with a treatment that degrades DNA

Answer 7

Deoxyribonuclease (DNase)

Question 8

Extra chromosomal entities, usually double stranded circles

Answer 8

Plasmids

Question 9

Plasmids carrying the genes for inactivation or circumvention of antibiotic action (RTF)

Answer 9

R factor

Question 10

Type of plasmid that is 1-2 copies per chromosome, ie F and some R factor
Carey genes for their own transfer and propagation, self transmissible

Answer 10

Large plasmids

Question 11

Type of plasmid that cannot carry genes to direct their own maintenance, 20 copies per chromosome, use cell division for transformation

Answer 11

Small plasmids