Human Fertilization Process Quiz

Before orgasm: small amount, ______ gland secretions

During orgasm: majority release, ______ vesicle/prostate secretions

A single ejaculation has an average of 182 million ______

The acrosome contains many enzymes vital for ______

Two ova and two sperm = ______

One ova and one sperm spontaneously splitting = ______

______ is the development of a new zygote without a fertilization event. This is a new organism forming from an egg not penetrated by sperm.

______ Occurs from errors in meiosis or fertilization. Most (>90%) will spontaneously abort within the first trimester.

Seminal ______ upon entry into the vaginal canal, but liquefies again after 20 minutes, increasing vaginal pH to 7.2

Orgasm induces rhythmic contractions in the ______ which move sperm towards the cervix and uterus

Cervical mucus liquefies around ovulation allowing sperm to pass into the uterus, but only about 1 million sperm make it through the ______

Sperm 'climb' up the uterus aided by uterine contractions and cilia action, but many are targeted by ______

The ______ acts as a temporary storage area for sperm, with many swimming past the ovulated egg

Capacitation and hyperactivation of sperm are necessary for fertilization, enabling them to survive in the reproductive tract for up to 6 ______

Fertilization is most likely to occur in the 5 days before ovulation and the day of ______

Steps of fertilization involve penetration of the cumulus oophorus, zona pellucida, attachment to the egg plasma membrane, cortical reaction, completion of meiosis II, and ______ generation

Hyaluronidase in sperm breaks down hyaluronic acid in the cumulus oophorus, allowing sperm to reach the ______

Sperm recognition of a glycoprotein in the zona pellucida triggers the acrosome reaction, leading to the degradation of the ______

Completion of meiosis II in the egg after fertilization removes extra DNA copies and creates the second ______

The egg and sperm pronuclei migrate towards each other, replicate their DNA, and fuse to create the zygote. The primary sex ratio is 120:100 for early aborted embryos and 105:100 for ______