Genetics Review 2024

When an organism inherits two of the same alleles for a trait, they are

• homozygous

• identical twins

• codominant

• heterozygous

When an organism inherits two different alleles for a trait, they are

• homozygous

• siblings

• codominant

• heterozygous

Gregor Mendel established the idea of

• incomplete dominance

• sticky notes

• codominance

• dominant and recessive alleles

One homozygous parent has a small mouth. The other homozygous parent has a large mouth. Their heterozygous offspring has a medium-sized mouth. This is

• simple dominance

• codominance

• incomplete dominance

What is a record of an organism's ancestors that gives information about the traits that may be passed down?

• A Punnett Square

• A pedigree

• A karyotype

• A diary

_______ occurs when a group of gene pairs act together to produce a single trait. It creates a lot of variety (fingerprints, skin color...)

• Polygenic inheritance

• Simple dominance

• Codominance

• Incomplete dominance

One homozygous parent has brown fur. The other homozygous parent has white fur. Their heterozygous offspring has white and brown fur. This is

• simple dominance

• codominance

• incomplete dominance

What is a recessive genetic disorder?

• A person must inherit two recessive alleles to have the disorder.

• A person must be heterozygous to have the disorder.

• A person must inherit two dominant alleles to have the disorder.

Can two organisms with different genotypes have the same phenotype?

• Yes

• No

Purple eyebrows are dominant over pink eyebrows.

If you are looking at a creature with purple eyebrows, can you know it's exact genotype?

• Yes - It will be ee.

• Yes, it will be EE.

• No, it could be Ee or ee.

• No, it could be EE or Ee.