In Humans, Separation of the Cells at the Two- Cell

question 106

Multiple Choice

In humans, separation of the cells at the two- cell state following fertilization may lead to the production of twins, which in this case would be .

• A) of different sexes
• B) fraternal
• C) dizygotic
• D) identical

---

Definitions:

Pneumonectomy

A surgical procedure to remove one lung, often performed to treat lung cancer or severe lung disease.

Steroids

A large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms; examples include hormones and cholesterol.

Antibiotics

Medications used to prevent and treat bacterial infections by either killing bacteria or inhibiting their growth.

Mucus-Thinning Drugs

Medications designed to reduce the viscosity of mucus, helping to alleviate congestion in the respiratory tract.