6.1

Question 1

Zygote

Answer 1

A fertilized egg

Question 2

Genotype

Answer 2

Genetic characteristic

Question 3

Phenotype

Answer 3

Physical characteristic

Question 4

What happens with a zygote during the first two weeks after conception?

Answer 4

The zygote goes through rapid cell division. At first the cell produces 100 identical cells, but eventually it starts to differentiate and create cells that will lead to specific structures

Question 5

What are the first 10 to 14 days after conception known as?

Answer 5

The germinal stage (Least vulnerable to environmental influences)

Question 6

When is the sex of a child determined?

Answer 6

During the germinal stage. The father is the one who determines the sex of the baby by providing either an X or Y chromosome (XY = Boy/ XX = Girl)

Question 7

What’s an embryo

Answer 7

It is the inner cells of a zygote that become a person. The outer cells become the placenta

Question 8

What stage comes after the germinal stage?

Answer 8

Embryonic stage

Question 9

What is the function of the placenta?

Answer 9

It allows for the transfer of oxygen and nutrients from the mother to the embryo

Question 10

How do teratogens affect pregnancy?

Answer 10

Teratogens are harmful substances that can cause birth defects or abnormalities in a developing embryo or fetus

Question 11

Identify two changes that happen in the embryonic stage

Answer 11

Answers may vary. Examples: 1) Organs form2)Heart starts to beat 3) CNS develops

Question 12

When does the embryo become a fetus?

Answer 12

At 9 weeks, which is also when the fetal stage starts

Question 13

Identify two changes that happen in the fetal stage.

Answer 13

Answers may vary. Examples: 1) Hearing develops2) Sex organs develop 3) Brain, bones, & muscles develop