Chapter 5: Genetics

Alleles are different forms of a ____________.

• chromosome.
• gene.
• nucleotide.
• proteins.

What is DNA?

• an organism's genetic material
• a ribonucleic acid that carries the code for making proteins
• the material in our body
• something that codes for a mutation

Codominance occurs...

• when both alleles can be observed in the offspring's phenotype.
• when the offspring's when phenotype is a blend of parent's phenotypes.
• when multiple genes determine the trait.
• when dominant and recessive traits are unavailable.

When the genotype consists of a dominant and recessive allele, the phenotype will show as the __________ allele

• dominant
• recessive
• neither

Incomplete dominance is...

• when the offspring's phenotype is a blend of the parent's phenotypes.
• when both alleles can be observed in the offspring's phenotypes.
• when multiple genes determine the phenotype of a trait.
• when dominant and recessive traits are unavailable.

Factors that control traits are called _____

• phenotypes.
• genes.
• parents.
• recessives.

Scientists call an organism that has two different alleles for a trait a ___________.

• homozygous dominant - purebred.
• homozygous recessive - purebred.
• heterozygous - hybrid.
• incomplete dominance.

What do we use Punnett Squares for?

• they help us create a model to predict possible genotypes and phenotypes of offspring
• they help us create a model to only predict genotype
• they help us create a model to only predict phenotype
• they help us create a model to tell us exactly what the offspring will be

Who is the father of genetics?

• Gregor Mendel
• Isaac Newton
• Mr. Sander
• Ms. Nelson

What does the notation TT mean to scientists or us?

• two recessive alleles
• two dominant alleles
• one dominant allele
• one dominant and one recessive allele