Exploring Incomplete Dominance and Polygenic Inheritance

What results from crossing two F1 heterozygote chickens in incomplete dominance?

• 1 black, 1 white, 2 grayish blue chickens

• All black chickens

• All white chickens

• 1 black, 2 white, 1 grayish blue chickens

In codominance, what phenotype would F1 chickens exhibit if one parent is black feathered and the other is white feathered?

• Both black and white feathers

• Black feathers only

• Grayish blue feathers

• White feathers only

Which flower example demonstrates codominance?

• Flower with spots

• Flower with blended colors

• Flower showing both parent colors distinctly

• Flower with stripes

What does the presence of multiple alleles indicate about a trait?

• It is less likely to appear in the population

• It does not follow Mendelian genetics

• It is influenced by more than two allele types

• It can only be inherited from one parent

What does the term 'codominance' imply about the alleles?

• Alleles blend into a new phenotype

• Both alleles contribute equally to the phenotype

• One allele masks the effect of another

• Alleles are not present in the phenotype

What blood type results from a person inheriting one A allele and one B allele?

• Type O

• Type A

• Type AB

• Type B

What is the phenotypic outcome when two heterozygous type A and type B parents are crossed?

• Only type O children

• Only type A and B children

• Only type AB children

• Type A, B, AB, and O children

In the context of blood types, what does it mean if a trait is 'dominant'?

• It blends with other alleles

• It never appears in the phenotype

• It can appear even if only one allele is present

• It appears only if both alleles are the same

Which statement is true about polygenic inheritance?

• It only affects non-visible traits

• It is a simpler form of inheritance

• It involves multiple genes determining a trait

• It involves a single gene influencing a trait

How does the phenotype of skin color in humans arise according to the video?

• Randomly without genetic influence

• From two genes

• From a single gene

• From multiple interacting genes