Incomplete Dominance and Codominance Concepts

The video tutorial explores complex inheritance patterns, including incomplete dominance, codominance, and multiple alleles. It begins with a review of Mendelian principles and progresses to more intricate genetic interactions. Incomplete dominance is illustrated with examples like pink flowers, while codominance is explained using Roma cattle. The concept of multiple alleles is demonstrated through blood type genetics. The tutorial concludes with a reference to additional resources for deeper understanding.

What is a key difference between Mendelian inheritance and more complex patterns of inheritance?

• Complex patterns involve only one allele.

• Mendelian inheritance involves multiple genes.

• Complex patterns do not involve any alleles.

• Mendelian inheritance is ruled by a single gene with two alleles.

In incomplete dominance, what is the result of crossing a dark pink and a white flower?

• A flower that is completely white.

• A flower that is either dark pink or white.

• A flower with both dark pink and white spots.

• A flower that is a blend of dark pink and white.

Which notation might you see for alleles in incomplete dominance?

• Two capital letters or variations like r1 and r2.

• Only one capital letter.

• A combination of uppercase and lowercase letters.

• Two lowercase letters.

What is a common example used to illustrate codominance?

• Blood types.

• Roma cattle with tan and white spots.

• Pink flowers.

• Pea plants.

In codominance, how are alleles typically represented?

• With lowercase letters.

• With a mix of uppercase and lowercase letters.

• With numbers.

• With two different capital letters.

How many alleles can an individual carry for a given gene?

• One

• Three

• Two

• Four

Which of the following is an example of a gene with multiple alleles?

• Skin color

• Eye color

• Blood type

• Height

What alleles determine Type A blood?

• Big I A and Big I B

• Big I A and little i

• Two little i's

• Little i and Big I B

What is required to have Type O blood?

• One copy of little i

• Two copies of little i

• One copy of Big I B

• Two copies of Big I A

Which blood type is an example of codominance?

• Type B

• Type A

• Type O

• Type AB