Topic 46

Question 1

In vitro

Answer 1

in glass

Question 2

In vitro conservation

Answer 2

refers to the conservation of an animal in an artificial environment, under cryogenic conditions including inter alia, he cryoconsercation of embryos, semen, oocytes, somatic cells or tissues having the potential to reconstitute live animals at a later date

Question 3

How long can they be preserved for?

Answer 3

Decades and centuries

Question 4

Semen methods of preservation

Answer 4

freezing; sufficient amount must be collected to produce the number of backcross genrerations required

Question 5

Oocytes methods of preservation

Answer 5

hasn’t been successful in bird eggs; embryos from some mammalian livestock species can be produced in vitro from matured oocytes collected at slaughter or from live females by ovum pick up; can be frozen

Question 6

Embryos preservation

Answer 6

embryos of all mammals can be frozen, thawed and transferred to recipient female; limited to cattle, sheep, goats; need to sacrifice the pig to get embryos; experimental in horses; the method of collection (biopsied, in vitro or cloned) and stage of maturation greatly affect the likelihood of having a successful pregnancy; allows full recovery of the genome