OL Genetics Quiz #1 Review

What does the notation tt mean to genetics?

• Two dominant alleles.

• Two recessive alleles.

• At least one dominant allele.

• One dominant and one recessive allele.

What does a Punnett square show?

• all the possible outcomes of a genetic cross

• only the dominant alleles in a genetic cross

• only the recessive alleles in a genetic cross

• all of Mendel's discoveries about genetic crosses

Scientists call an organism that has two different alleles ____

• heterozygous

• trait

• homozygous

• factor

An allele whose trait always shows up in an organism when the allele is present is

• gene

• dominant

• recessive

• hereditary

What is the study of how traits are inherited through the actions of alleles?

• Taxonomy

• Genetics

• Chemistry

• Dominance

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS4-3

What is another term to represent a homozygous organism?

• Purebred

• Hybrid

• Ryebred

• Inbred

What are segments of DNA that carry genetic instructions for a specific trait called?

• gene

• nucleotide

• ribosome

• protein

Tags

NGSS.HS-LS3-1

Passing of traits from parents to offspring.

• cross-pollination

• dominant trait

• recessive trait

• heredity

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

The different forms of a gene that decides a characteristic are known as

• phenotypes

• alleles

• albinism

• genes

Tags

NGSS.HS-LS3-1

What is an organism’s physical appearance called?

• codominance

• phenotype

• heterozygous

• genotype