Heredity and Chromosomes Quiz

What is heredity?

• Change in species over time

• Passing traits from parents to offspring

• Random mutation of genes

• Formation of new species

Who believed that a substance in semen caused pregnancy about 2000 years ago?

• Aristotle

• Hippocrates

• Darwin

• Mendel

What did early scientists find under the microscope related to heredity?

• Red blood cells

• Chromosomes

• Sperm cells

• White blood cells

The disproved idea of a "homunculus" suggested:

• Chromosomes carry genes

• A miniature human exists inside sperm

• Genes mutate randomly

• DNA replicates itself

Chromosomes are:

• Made of proteins only

• Thread-like structures of nucleic acids and proteins

• Found in cytoplasm

• Only in prokaryotic cells

Each homologous chromosome pair has:

• Identical sequences

• Different lengths and shapes

• Similar size and shape

• Different DNA molecules

How many chromosomes are found in a human somatic cell?

• 23

• 46

• 12

• 6

In humans, chromosomes are organized into:

• 12 pairs

• 23 pairs

• 46 pairs

• 6 pairs

Which plant has 12 chromosomes organized into 6 pairs?

• Wheat

• Broad bean

• Corn

• Rice

What is the basic hereditary unit?

• Chromosome

• DNA

• Enzyme

• Gene