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Hemophilia is a recessive x-linked disorder. Which genotype represents a female who is a carrier for haemophilia?

• X^HX^h
• X^hX^h
• X^HX^H
• X^hY

H= normal blood clotting

h=haemophilia

What is the probability that any of the offspring will have haemophilia in a cross between the two individuals below?

X^HX^h x X^HY

• 4/4

• 3/4

• 2/4

• 1/4

What percentage of the male offspring will have this recessive disease?

• 0%
• 25%
• 50%
• 75%

What is NOT a possible genotype for someone with type B blood?

• I^BI^B

• I^AI^B

• I^Bi

What is the genotype of a person with type A blood, who had a father with type O blood?

• I^AI^B

• I^Ai

• I^AI^A

• ii

Which term(s) best describes the inheritance of human blood types? 

• incomplete dominance and multiple alleles
• codominance and epistasis
• codominance and multiple alleles
• incomplete dominance and codominance

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

• Incomplete Dominance

• Codominance

• Independent assortment

• Recessive inheritance

A roan cow shows co-dominance in fur color (red and white). What is the phenotype ratio expected if a roan cow and a roan steer mate together?

• 4/4 Red and White

• 2/4 Red, 2/4 White

• 2/4 Red, 2/4 Roan, 0/4 White

• 1/4 Red, 2/4 Roan, 1/4 White

A bubble guppy with a yellow tail has offspring with a bubble guppy with a red tail. The offspring have orange tails. What is this an example of?

• Codominance

• Incomplete Dominance

• Multiple Alleles

• Polygenic Triats

The trait that will be expressed only if two copies of the allele are present.

• Recessive

• Dominant

• DNA