Genetics & Heredity Review

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages for the possible genotypes?

• 100% BB

• 75% BB and 25% Bb

• 50% Bb and 50% bb

• 50% BB and 50% Bb

What is the name of the scientist who is known as the "father of modern genetics"?

• Albert Einstein

• Robert Hooke

• Gregor Mendel

• Reginald C. Punnett

Look at the diagram below. Which of these choices should be placed in the box with the question mark?

• AA

• Aa

• aa

• AA or aa, but not possible to determine which one

Alisha and Rob would like to have children. A genetic counselor tells them that they are both carriers of a certain genetic disease. What does this mean?

• They are both immune to the disease, and it is very likely that their children will also be immune to it.

• There is a very high probability that one or both of them will develop the disease at some point in the future.

• They both have the disease, but there is a very low probability that they will pass it on to their children.

• They both have an allele for the disease and could pass this allele on to their children, even though neither one of them has the disease.

Factors that control traits are called _____________.

• genes

• purebreds

• recessive

• parents

Michael is a tall, 13 year old drummer. He has a scar on his right cheek. He is good at swimming. Which of his traits did Michael most likely inherit?

• Height

• His scar

• Ability to swim

• Ability to play drums

What does the notation AA mean in genetics?

• two dominant alleles

• two recessive alleles

• at least one dominant allele

• one dominant and one recessive

An organism's physical appearance is its __________________.

• genotype

• phenotype

• allele

• gene

Which term refers to characteristics passed down from parent to offspring?

• purebred

• generations

• hybrids

• traits

An organism's genotype is its ________________.

• genetic makeup

• feather color

• physical appearance

• stem height