Jennifer is pregnant and has just had an ultrasound.The radiologist told Jennifer that she was going to have a boy.This is referring to her baby's

A) sex.
B) gender.
C) chromosomes.
D) unisex characteristics.

Sex

A biological characteristic defining male and female organisms based on reproductive anatomy and function.

Ultrasound

A diagnostic imaging technique that uses high-frequency sound waves to create images of structures within the body, commonly used for viewing fetuses during pregnancy.

Chromosomes

Threadlike structures made of DNA molecules that contain the genes.