Genetics Test

First name

Last Name

Period

The drawing below represents a pair of chromosomes. The area labeled "bands" shows the location of:

• egg cells
• reproductive hormones
• sperm cells
• specific genes

Each body cell of a goldfish contains 94 chromosomes. How many chromosomes are contained in a gold fish sex cell?

• 23
• 47
• 94
• 188

Compared to the amount of hereditary information in a human body cell, how much hereditary information is contained in a human sex cell?

• one-quarter the amount
• the same amount
• one-half the amount
• twice the amount

In living things, traits are passed on from one generation to the next by the transfer of:

• blood
• minerals
• Calories
• DNA

A research team wanted to produce a smaller variety of German shepherd dogs. They mated the smallest dogs from different litters for several generations. This is an example of which concept?

• extinction
• mutation
• selective breeding
• natural selection

In humans, a fertilized egg contains 46 chromosomes. Which bar graph best represents the number of chromosomes contained in the sperm and egg before they united to make the fertilized egg?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

A Punnett square is shown below. The dominant trait is represented by R. The recessive trait is represented by r. What percentage of the offspring will most likely show the dominant trait?

• 25%
• 50%
• 75%
• 100%