Genetics Exam

Human body cells each have 46 chromosomes in the nuclei. Meiosis is necessary in order to ensure that each gamete produced in the human body has –

• 12 chromosomes

• 23 chromosomes

• 46 chromosomes

• 92 chromosomes

During meiosis, homologous chromosomes exchange genetic material during a process called cross-over. This exchange of genetic material –

• increases the genetic variation

• reduces the diploid number to the haploid number

• increases the haploid number to the diploid number

• reduces the probabilities of mutations

Sexual reproduction in animals depends on the production of gametes. Which of these processes produces gametes in animals?

• mitosis

• fertilization

• meiosis

• binary fission

Produces 2 identical cells

• Mitosis

• Meiosis

• Both

Produces 4 cells that are not identical

• mitosis

• meiosis

• both

The number of human chromosomes is

• 23

• 46

• 92

• 64

How are similarities passed from parent to offspring?

• through teaching
• through learning
• through blood
• through genes

Why are your chromosomes arranged in pairs?

• Scientists have no idea
• Because you get one from your mom and one from your dad
• Because pairs can divide easier
• Because DNA is awesome

How many pairs of chromosomes do human cells contain?

• 23

• 46

• 16

• 32

We inherit our genes from ...

• our nucleus.

• our parents.

• from the food we eat.