Understanding Inheritance Chapter Quiz

What determines the expression of traits?

• Genetic makeup

• Environmental factors

• Both genetic makeup and environmental factors

• Random chance

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How can inheritance be modeled?

• Using classes and objects

• Through functions and procedures

• By utilizing arrays and lists

• With the help of variables and constants

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How do some patterns of inheritance differ from Mendel’s model?

• They involve multiple alleles.

• They follow Mendel's laws strictly.

• They do not involve any genetic variation.

• They are based on a single trait.

How many alleles controlled flower color in Mendel’s experiments?

• One

• Two

• Three

• Four

In a pea plant, an allele for a tall stem is dominant to an allele for a short stem. You see a pea plant with a short stem. What can you conclude about the genotype of this plant?

• The plant is homozygous dominant.

• The plant is heterozygous.

• The plant is homozygous recessive.

• The plant has a mutation.

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Alleles determine the expression of traits by:

• coding for different proteins that affect traits

• being identical in all individuals

• not affecting the phenotype

• only being present in animals

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Identify the genotype of a plant that produces a wrinkled pea.

• Homozygous recessive (rr)

• Homozygous dominant (RR)

• Heterozygous (Rr)

• Homozygous dominant (YY)

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What phenotypes are possible for pea offspring of this cross?

• Green and wrinkled

• Yellow and round

• Green and round

• Yellow and wrinkled

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If the cross shown in the figure produced 100 offspring, about how many offspring would have green peas?

• 25

• 50

• 75

• 100

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What does the ratio 3:1 mean?

• It means 3 parts of one quantity to 1 part of another quantity.

• It means 3 parts of one quantity to 3 parts of another quantity.

• It means 1 part of one quantity to 3 parts of another quantity.

• It means 3 parts of one quantity to 2 parts of another quantity.