Exploring Incomplete Dominance and Codominance in Genetics

The video tutorial explains the concepts of incomplete dominance and codominance in genetics. Incomplete dominance occurs when neither allele is dominant, resulting in a blended phenotype, as demonstrated with red and white tulips producing pink offspring. Codominance is when both alleles are dominant and expressed together, exemplified by black and white bunnies producing spotted offspring. The tutorial uses examples and punnett squares to illustrate these genetic principles.

What is incomplete dominance?

• When neither allele is dominant, resulting in a blended phenotype

• When one allele is completely dominant over the other

• When alleles do not affect the phenotype

• When both alleles are recessive

In incomplete dominance, what type of letters are used to represent the alleles?

• Two lowercase letters

• One uppercase letter

• One uppercase and one lowercase letter

• Two uppercase letters

What color flowers result from crossing red and white tulips in incomplete dominance?

• Purple

• Red

• White

• Pink

When crossing two pink tulips, what percentage of the offspring will be red?

• 50%

• 25%

• 0%

• 75%

When crossing two pink tulips, what percentage of the offspring will be white?

• 75%

• 25%

• 0%

• 50%

When crossing two pink tulips, what percentage of the offspring will be pink?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.MS-LS3-2

What is codominance?

• When alleles do not affect the phenotype

• When one allele is completely dominant over the other

• When neither allele is dominant, resulting in a blended phenotype

• When both alleles are dominant and show up together

In codominance, what type of letters are used to represent the alleles?

• One uppercase letter

• Two uppercase letters

• One uppercase and one lowercase letter

• Two lowercase letters

What type of offspring will be produced if a black bunny and a spotted bunny are mated?

• All black

• All white

• All spotted

• 50% black and 50% spotted

Tags

NGSS.MS-LS3-2

When crossing a black bunny with a spotted bunny, what percentage of the offspring will be white?

• 0%

• 25%

• 75%

• 50%