Non-Mendelian Inheritance

Which of the following is describes the blending of characteristics or the appearance of an intermediate phenotype from the two parents?

• codominance

• incomplete dominance

• multiple alleles

• sex-linked traits

Which pattern of inheritance is described when heterozygous characteristics are both fully expressed in offspring?

• multiple alleles

• incomplete dominance

• codominance

• sex-linked traits

Which of the following traits is controlled by multiple alleles?

• hemophilia

• coat colors of cattle

• flower color of gumamela

• human blood groups

Which of the following is TRUE about sex-linked traits?

• Sex-linked traits are recessive.

• They are controlled by the genes found in the somatic chromosomes

• The traits are expressed only in one gender.

• The traits are controlled by three or more alleles.

What pattern of inheritance is shown above?

• codominance

• multiple alleles

• incomplete dominance

• sex-limited trait

An AB blood type mother has children with a B blood type father (genotype BO). What are the chances that their children will have AO blood type?

• 25%

• 50%

• 75%

• 100%

In some chickens, feather color is controlled by codominance. When a black chicken mates with a white chicken, all of the offspring are covered in both black and white feathers.

A farmer mates a black chicken (BB) with a black-and-white (BW) chicken.

What are the chances of having white chicken?

• 0%

• 25%

• 50%

• 100%

In humans, hair texture exhibits incomplete dominance. 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 heterozygous parents have a child.

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

• 50%

• 25%

• 75%

• 0%

Coat color in rabbits depends on three alleles.

A rabbit breeder crosses a chinchilla rabbit with a dark gray rabbit.

What is the percentage of having chinchilla offspring?

• 0%

• 25%

• 50%

• 75%

• 100%

Solve this problem involving codominance.

A breeder only wanted cattle with red fur. What should be the genotypes of the parent cattle to achieve this?

R-red

W-white

RW-roan

• RR x RR

• RW X RW

• WW X WW

• WR X WR