Genetics Quiz 2

Who was Gregor Mendel?

• a scientist who studied pea plants and came up with the study of genetics

• A scientist who studied and bred dogs and came up with the study of genetics

When Mendel was studying flower color, purple was dominant (P), white was recessive (p). What is/are the possible genotypes for a homozygous purple flower?

• Pp

• PP

Look at the picture. Mendel crossed (mated) a homozygous purple-flowered plant (PP) with a homozygous white-flowered plant (pp). What color are the offspring (baby flowers)?

• All white

• All purple

_______ _______ are the building blocks of proteins.

• Amino acids

• Double helix

A dominant allele:

• Masks the effects of another allele

• Is never passed from parents to offspring

A plant, for instance, that carries both a dominant and a recessive allele (letter) for a certain trait is said to be ______.

• hybrid

• recessive

If one allele (letter, or trait) is masked by the other in the pair (Pp, for example), the masked allele is said to be ______.

• dominant

• recessive

Heredity is:

• The process by which parents pass characteristics or traits on to their children

• True of people, plants, and other organisms where there are parents and offspring

• all of the above

What are genes?

• Segments of DNA that carry instructions for the traits of an offspring

• DNA

What does DNA stand for?

• did not ask

• deoxyribonucleic acid