(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