Conception has occurred when

A) the egg cell is released from the ovary.
B) the sperm cell is released from the testis.
C) the chromosomes from the egg cell align with those from the sperm cell.
D) the chromosomes combine to form 23 new pairs with a unique set of genetic instructions.

Chromosomes

Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of DNA.

Conception

The process of a sperm fertilizing an ovum, resulting in the formation of a zygote and the beginning of pregnancy.

Genetic Instructions

The information encoded in an organism's DNA that guides growth, development, and functioning.