demoworksheets

non- mendelian inheritance

incomplete dominance

co-dominance

Polygenic inheritance

Incomplete dominance

• Happens when one allele is not completely dominant to the other.

• In this case the resulted phenotype is a blend between the two traits.

• Ex) A baby with a wavy hair can be born for a couple that one of them with straight hair and the other with a curly hair.

Codominance

• When both alleles are simultaneously expressed in the heterozygote.

• Ex) when red buffalo is crossed with a white one their offspring will demonstrate both colors.

Multiple alleles

• A gene that is controlled by more than two alleles.

• Ex) ABO blood type. Blood type is controlled by three alleles. Each individual will have just two alleles of the three.

ABO blood group is an example of multiple alleles, complete dominance, and co-dominance inheritance.

Multiple Choice

Mama Isabella has a blood type of O. Her son, Norman, has also a blood type of O. What is the blood type of Norman's father?

• A

• B

• AB

• O

Multiple Choice

If the image were real, it would represent what type of inheritance pattern?

• Incomplete Dominance

• Codominance

• Multiple Alleles

• Polygenic Inheritance

Multiple Choice

The two cows on the top are the parents and the cow on the bottom is the offspring. What is the type of inheritance pattern is being exhibited?

• Incomplete Dominance

• Codominance

• Multiple Alleles

• Polygenic Inheritance

Multiple Choice

What type of inheritance pattern does the diagram represent?

• Incomplete Dominance

• Codominance

• Multiple Alleles

• Polygenic Inheritance

Multiple Choice

In humans, the gene for curly hair (H) is incompletely dominant to the gene for straight hair (h). Individuals that are heterozygous (Hh) have wavy hair.

Two wavy-haired heterozygous parents have a child.

What is the likeliness that the child will have wavy hair?

• 1/4

• 1/2

• 3/4

• 4/4

Multiple Alleles: Blood types

• Non-mendelian inheritance

• more than two alleles are available for a trait

• Human blood types are an example

Multiple Choice

When red snapdragons are crossed with white snapdragons, the offspring produce pink flowers. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

When red snapdragons are crossed with white snapdragons, the offspring produce pink flowers. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

When red cows are crossed with white cow, the offspring have a mix of red hair and white hair. These cows are called roan. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

The gene for human blood type has three alleles, A, B and O. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

This flower is produced by crossing a pink-flowering plant and a white-flowering plant. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

If a dark brown horse and a white horse are bred, the offspring are palomino (tan). This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

Checkered chickens have an allele for black feathers and an allele for white feathers. This is an example of:

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

Fur color in rabbits is controlled by a single gene. There are many different phenotypes. What is the best explanation for this?

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

Mom was black. Dad was white. What is the most likely explanation?

• complete dominance

• incomplete dominance

• codominance

• polygenic inheritance

• multiple alleles

Multiple Choice

The physical characteristics of an organism are its

• Genotype

• Mutation

• Hybrid

• Phenotype

Multiple Choice

When two alleles are the same they are

• Hybrid

• Homozygous

• Crossed

• Heterozygous

Multiple Choice

Two spotted leopards produce a litter of four cubs. Three of the cubs are spotted and one is solid black. The black coat is probably what type of trait?

• Environmental

• Crossed

• Dominant

• Recessive

Multiple Choice

One cat is heterozygous, long hair (Rr), and it mate carries homozygous short hair (rr). What is the probability of the offspring having short hair?

• 50%

• 25%

• 75%

• 100%

Multiple Choice

In Geckos spots are dominate to striped. If two Gecko that are RR and rr what is the possibility of the offspring being spotted?

• 0%

• 25%

• 100%

• 50%