Bio 3 Flashcards
Asexual and sexual reproduction
. For asexual reproduction Plants send runners and hydra perform budding. Fungi reproduce asexually via sporulation, budding or fragmentation. Advantages of asexual reproduction are that there is no need to possess mating behaviours, special anatomy or look for a mate. It also benefits organisms that invade new environments since finding a mate would be hard in that situation. Aphids reproduce asexually to make only females in favourable conditions allowing rapid population grow during these times. Disadvantages of sexual reproduction is that animals must have special anatomies that may attract predators. In humans, assisted reproductive technologies increase chances of reproductive success but are controversial. Amniocentesis is the removal of cells from a fluid filled sac surrounding a fetus. Multiple marker screening is testing for hormone levels that correspond to a disorder. In vitro fertilization is the fertilization of an egg outside the body with Intracytoplasmic sperm injection, injection of a single sperm into an egg. But this may cause hardening of the zona pellucida which laser assisted hatching prevents. The process of placing sperm into the uterus is artificial insemination, which had been used on other animals but is very costly.
