8.B Genetics Vocab

Which term describes the genetic makeup of an organism?

• Phenotype

• Genotype

• Trait

• Chromosome

Which of the following is a phenotype?

• Aa

• TT

• Blue eyes

• Heterozygous

What does it mean if an allele is dominant?

• It hides the recessive allele when present

• It can only be seen in homozygous form

• It is weaker than a recessive allele

• It is only found in parents

Which pair of alleles is homozygous recessive?

• AA

• Aa

• aa

• Ab

Which pair of alleles is heterozygous?

• AA

• aa

• Aa

• A

What is a trait?

• A type of cell

• A section of DNA

• A physical characteristic passed from parents to offspring

• An organ in the body

Which of the following represents a dominant genotype?

• aa

• Aa

• tt

• ff

What does a Punnett square show?

• How cells divide

• Genetic disorders

• Possible offspring genotypes

• The parts of a chromosome

What is an allele?

• A chromosome

• A version of a gene

• A type of cell

• A protein

A recessive trait will show only if:

• At least one dominant allele is present

• Two recessive alleles are present

• The genotype is heterozygous

• There are no genes involved