(1) Assignment 4: Growth and Development

The female gamete is called a/an _____ cell and the male gamete is called a/an _____ cell.

egg, sperm

After the zygote divides into two cells, it is called an _____.

embryo

Conception occurs when the _____ gamete fertilizes the _____ gamete.

male, female

In which trimester does the following occur? "Continued development makes movement in the womb possible."

second

In which trimester does the following occur? "Facial features become apparent."

second

In which trimester does the following occur? "The respiratory system becomes mature."

third

How many chromosomes are contained in the nucleus of each cell in the human body

46

Fetal development occurs over _____ trimesters of pregnancy.

Three

In which trimester does the following occur? "A sac called a placenta forms around the embryo and is connected to the embryo with an umbilical cord."

first

In which trimester does the following occur? "The placenta begins absorbing nutrients and oxygen from the mother's body."

first

The male and female gamete each contribute a _____ of the zygote's DNA material.

half