Prenatal Part 1

Where does the DNA in a zygote come from?

• Only from the mother’s egg

• Only from the father’s sperm

• Half from the mother’s egg and half from the father’s sperm

• From the environment

What kind of information do chromosomes carry?

• Only information about blood type

• Only information about age

• Genetic information like eye color, hair color, and height

• Information about diet

Explain why a zygote contains 46 chromosomes and discuss the significance of this number for human development.

• Because it is the number needed for a cell to divide

• Because it is the sum of 23 chromosomes from each parent, providing the complete set of genetic instructions for human development

• Because it is the number found in all animal cells

• Because it is a random number

What is the main function of the pronucleus in a cell?

• To store genetic information

• To provide energy for the cell

• To control cell movement

• To digest nutrients

Where does the female pronucleus in a zygote come from?

• The sperm

• The egg

• The mitochondria

• The cytoplasm

What is the main function of the cytoplasm in a cell?

• It stores genetic information

• It holds everything in place inside the cell

• It produces energy for the cell

• It controls what enters and leaves the cell

Why is the cytoplasm important for cell division?

• It provides energy for the cell

• It carries out all the functions for cell division

• It protects the cell from viruses

• It stores waste products

How does the cytoplasm contribute to the operation of other cell parts?

• It destroys harmful substances

• It allows other parts to operate within the cell

• It creates new cells

• It transports oxygen

Why is it important for the zona pellucida to prevent multiple sperm cells from fertilizing the same egg?

• To prevent a Molar Pregnancy (tumors in uterus).

• To speed up the fertilization process.

• To allow more genetic diversity.

• To make the egg larger.

What is a blastocyst?

• A cluster of dividing cells.

• A single fertilized egg.

• A mature red blood cell.

• A type of bacteria.