Apedia

A-Level Biology OCR A

Embryos Animals Mature Ova Fertilised Early Lab Cells

This flashcard describes the process of "artificial twinning" for cloning animals. It starts with superovulating a desirable cow, fertilizing her eggs, and then splitting early embryos (when cells are totipotent, around day six). These split embryos are cultured in the lab and then implanted into surrogate mothers to produce identical animals.

Este flashcard describe el proceso de "gemelación artificial" para clonar animales. Comienza con la superovulación de una vaca deseable, la fertilización de sus óvulos y la división de los embriones tempranos (cuando las células son totipotentes, alrededor del día seis). Estos embriones divididos se cultivan en el laboratorio y luego se implantan en madres sustitutas para que nazcan animales idénticos.

Front Describe the process of cloning animals by splitting embryos.
Back Artificial twinning:
  • Cow with desirable trates is treated with hormones - she super ovulates, releasing more mature ova
  • Ova are fertilised naturally or artificially by a bull with good traits, early embryos are gently flushed out of uterus
  • Alternatively, mature eggs are removed and fertilised in lab
  • Before/around day six when cells are still totipotent, cells of early embryo are split to produce several smaller embryos, each capable of growing on to form a healthy full-term calf
  • Each of split embryos is grown in lab for few days before implanting into surrogate mother, each implanted into dif mother
  • Embryos develop into fetuses and are born normally - number of identical cloned animals produced by different mothers

Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.

Next card: Cell animal somatic nucleus nuclear removed adult enucleated

Previous card: Artificially cloning state ways animals artificial twinning somatic

Up to card list: A-Level Biology OCR A