Codominance Quiz

What is a Punnett square used for in genetics?

• Predicting the possible genotypes and phenotypes of offspring in a genetic cross

• Determining the gender of the offspring

• Calculating the probability of a genetic mutation

• Identifying the dominant traits in the parents

Tags

NGSS.HS-LS3-3

In a Punnett square, what do the letters inside the squares represent?

• Chromosomes in the cell

• Genes for unrelated traits

• Alleles for a specific trait

• Different species of organisms

What is codominance?

• Both alleles for a gene are expressed equally

• One allele for a gene is completely dominant over the other

• Codominance is when only one allele for a gene is expressed

• Codominance is a type of genetic disorder

Tags

NGSS.HS-LS3-2

Give an example of codominance in genetics.

• Roan cattle with both red and white hairs

• Black cattle with black hairs

• Brown cattle with brown hairs

• White cattle with white hairs

What are the genotypic and phenotypic ratios in a codominant cross between two heterozygous individuals?

• 1:3:1 for genotypic and 3:1 for phenotypic ratios

• 3:1:2 for genotypic and 1:1:1 for phenotypic ratios

• 2:1:1 for genotypic and 1:2:1 for phenotypic ratios

• 1:2:1 for both genotypic and phenotypic ratios

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

What is the color of the offspring?

• Red

• Pink

• Red and White

• Red and Red

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotype for parent one?

• RR

• WW

• RW

• WR

Tags

NGSS.HS-LS3-1

What is the genotype for parent two?

• RR

• WW

• RW

• WR

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the difference between genotype and phenotype?

• Genotype is the physical appearance, while phenotype is the genetic makeup

• Genotype is the genetic makeup, while phenotype is the physical appearance

• There is no difference between genotype and phenotype

• Genotype and phenotype are terms used in physics

What does a homozygous genotype mean?

• It means having two different alleles for a gene

• It means having two identical alleles for a gene

• It means having no alleles for a gene

• It means having three alleles for a gene

Tags

NGSS.HS-LS3-2