Mendelian Genetics Vocabulary Quiz

What term describes the genetic makeup of an organism, including all of its genes?

• Phenotype

• Genotype

• Allele

• Trait

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

What term is used to describe the physical, or observable characteristics or traits of an organism?

• Genotype

• Phenotype

• Allele

• Dominant

Tags

NGSS.HS-LS4-3

If an organism has two identical alleles for a particular trait, it is said to be:

• Heterozygous

• Homozygous

• Dominant

• Recessive

An organism with two different alleles for a single trait is considered:

• Homozygous

• Heterozygous

• Dominant

• Recessive

Which allele is the stronger allele and will always be expressed if present?

• Recessive

• Dominant

• Allele

• Phenotype

What is the term for different versions of a gene?

• Trait

• Allele

• Phenotype

• Genotype

In a heterozygous genotype, how are the alleles represented?

• Two identical letters (e.g., AA or aa)

• Two different letters (e.g., Aa)

• Two dominant alleles (e.g., AA)

• Two recessive alleles (e.g., aa)

Which of the following best describes a phenotype?

• The set of alleles that an organism carries

• The physical appearance resulting from the genotype

• A type of dominant gene

• A type of recessive gene

What does it mean if an allele is recessive?

• It will always be expressed in the phenotype.

• It will only be expressed in the phenotype if two copies are present.

• It is the most common allele in a population.

• It cannot be passed on to offspring.

In the context of Mendelian genetics, what does the term "homozygous" refer to?

• Having two different alleles for a trait

• Having two identical alleles for a trait

• The physical expression of a trait

• The genetic makeup of an organism