Mendel Genetics

What is the difference between genotype and phenotype?

• Genotype refers to the physical expression of traits, while phenotype refers to the genetic makeup.

• Genotype refers to the genetic makeup, while phenotype refers to the physical expression of that genetic makeup.

• Genotype and phenotype are the same and can be used interchangeably.

• Genotype refers to the observable characteristics, while phenotype refers to the underlying genetic code.

What does it mean for a trait to be dominant?

• A dominant trait is one that is expressed in the phenotype even if only one copy of the allele is present.

• A dominant trait is one that requires two copies of the allele to be expressed.

• A dominant trait is one that is always expressed in the genotype regardless of the phenotype.

• A dominant trait is one that can only be expressed in the absence of a recessive allele.

What is the law of independent assortment?

• The law of independent assortment states that alleles for different traits are distributed to gametes independently of one another.

• The law of independent assortment states that traits are inherited together from parents to offspring.

• The law of independent assortment states that all alleles are expressed in the phenotype of an organism.

• The law of independent assortment states that dominant traits always mask recessive traits.

What is an allele?

• A type of chromosome that determines the sex of an organism.

• A variant form of a gene that can produce different traits.

• A process by which cells divide and replicate.

• A structure within a cell that contains genetic material.

Which of the following is homozygous recessive? QQ, Qq, or qq?

• QQ

• Qq

• qq

• QqRr

What is the law of segregation?

• The law of segregation states that traits are inherited independently of one another.

• The law of segregation states that during the formation of gametes, the two alleles for a trait separate from each other.

• The law of segregation states that dominant alleles mask the effects of recessive alleles.

• The law of segregation states that alleles are blended together in offspring.

What does it mean for a trait to be recessive?

• A recessive trait is only expressed in the phenotype if two copies of the allele are present.

• A recessive trait is always expressed in the phenotype regardless of the allele copies.

• A recessive trait can be expressed with just one copy of the allele.

• A recessive trait is dominant over other traits.

If black fur is dominant and white fur is recessive, what are the possible offspring of two black mice bred together?

• All offspring will have black fur.

• All offspring will have white fur.

• Some offspring may have black fur and some may have white fur.

• any of the above are possible, depending on the parents' genotypes

What is a heterozygous genotype?

• A heterozygous genotype has two identical alleles for a particular gene.

• A heterozygous genotype has two different alleles for a particular gene.

• A heterozygous genotype is a type of mutation in a gene.

• A heterozygous genotype is when an organism has no alleles for a gene.

What is a homozygous genotype?

• A homozygous genotype has two identical alleles for a particular gene.

• A homozygous genotype has two different alleles for a particular gene.

• A homozygous genotype is a genetic condition that affects only males.

• A homozygous genotype refers to a gene that is not expressed.