Chapter 9 Non-Mendelian Genetics and Genetic Diseases

Spruce trees can have different colored reproductive cones. Trees with green cones can be crossed with trees with red cones. If these trees followed a codominant pattern of inheritance, what phenotype would you expect? (3B3)

• Offspring with red cones

• Offspring with green cones

• Offspring with orange cones

• Offspring with red and green cones

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A trait for snapdragon flower color is controlled by incomplete dominance.

A snapdragon plant with red flowers is crossed with a snapdragon plant with white flowers. What percent of the offspring will have pink flowers? Show your work on you paper. (3B3)

• 0%

• 25%

• 50%

• 100%

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If two pink snapdragon plants displaying incomplete dominance are crossed, what percent of offspring would you predict as also having pink flowers? Show your work on your paper. (3B3)

• 0%

• 25%

• 50%

• 100%

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Angora rabbits have long fur. Rex rabbits have short fur. When an Angora rabbit is bred with a Rex rabbit, the offspring have fur length a little bit longer than that of a Rex rabbit. Which of the following types of inheritance patterns best describes the offsprings’ fur length? (3B3)

• Codominance

• Incomplete dominance

• complete dominance

• Multiple alleles

A woman with heterozygous type A blood (IAi) marries a man with type AB blood (IAIB). Their children could have which of the following blood types? Select all that apply. Show your punnett square on you paper. (3B3)

• Type A

• Type B

• Type AB

• Type O

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Rabbits can have several coat colors. A dark gray rabbit and a Himilayan rabbit (having a white body but black ears, nose, and feet) have eight offspring. Four of the offspring are dark gray, two are Himilayan, and two are solid white. What explains the different phenotypes of the offspring? (3B3)

• Codominance

• Incomplete dominance

• complete dominance

• Multiple alleles

A woman with type AB blood marries a man with type O blood. Their children could have which of the following blood types? Select all that apply. Show your Punnett square on paper. (3B3)

• Type A

• Type B

• Type AB

• Type O

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A longhair cat (LL) is crossed with a shorthair cat (L’L’) resulting in medium length hair (LL’) in ALL offspring. If a cat with medium length hair (LL’) is crossed with a longhair (LL) cat, what percentage of the offspring can be predicted to have short hair (L’L’)? Show your Punnett square on paper. (3B3)

• 0%

• 25%

• 50%

• 100%

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Roan color in cattle is controlled by codominant genes for both red (R) and white (W) hair. If a roan cow is crossed with a white bull, what percent of offspring would be white? Show your Punnett square on paper. (3B3)

• 0%

• 25%

• 50%

• 100%

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The diagram represents the chromosome of a fruit fly.

The shaded region on the chromosome represents what? (3B3)

• Location of a gene

• Homologue

• autosomal disease

• Multiple alleles

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