Which process involves fertilizing eggs outside the body before transferring them to a recipient female?

Which process involves fertilizing eggs outside the body before transferring them to a recipient female?

• A. Recombination
• B. Replication
• C. In vitro fertilization
• D. Rederivation

Answer: (C)

In vitro fertilization is the process where eggs are fertilized outside the body and then the resulting embryos are transferred into a recipient female. In this approach, eggs are collected from a donor, fertilized in a controlled dish with sperm, and the developing embryos are later placed into the uterus of a surrogate to establish pregnancy. This technique gives researchers and technicians precise control over fertilization and early embryo development, and is widely used in lab animal programs to produce offspring from valuable or genetically modified lines, or to rederive animals under specific pathogen-free conditions. Recombination is genetic exchange during meiosis, not fertilization outside the body. Replication is the copying of DNA, not fertilization. Rederivation involves creating a clean, defined line (often via embryo transfer) to remove pathogens or contaminants, but it does not describe fertilizing eggs outside the body before transfer.

In vitro fertilization is the process where eggs are fertilized outside the body and then the resulting embryos are transferred into a recipient female. In this approach, eggs are collected from a donor, fertilized in a controlled dish with sperm, and the developing embryos are later placed into the uterus of a surrogate to establish pregnancy. This technique gives researchers and technicians precise control over fertilization and early embryo development, and is widely used in lab animal programs to produce offspring from valuable or genetically modified lines, or to rederive animals under specific pathogen-free conditions.

Recombination is genetic exchange during meiosis, not fertilization outside the body. Replication is the copying of DNA, not fertilization. Rederivation involves creating a clean, defined line (often via embryo transfer) to remove pathogens or contaminants, but it does not describe fertilizing eggs outside the body before transfer.