Answer:
a. embryologist
Step-by-step explanation:
An embryologist is a professional who specializes in the study of the development of the embryo from fertilization to birth. They are trained to handle gametes (sperm and eggs) and embryos in vitro (in a laboratory setting) as well as in vivo (inside the body).
In vivo fertilization refers to the process of fertilization that occurs naturally inside the female body, as opposed to in vitro fertilization (IVF), which is performed outside the body in a laboratory setting. An embryologist would be responsible for handling the gametes and embryos during in vivo fertilization, ensuring that they are properly fertilized and developing normally.
Geneticists and molecular biologists may also be involved in the process of in vivo fertilization, particularly if there are concerns about genetic disorders or hereditary diseases. However, their roles would be more focused on analyzing and interpreting genetic data, rather than directly handling the gametes and embryos.