AP Bio Unit 5 Test Review: 2020

Which of the following crossover events would be most difficult to detect in offspring?

• A crossover occurring in the region between gene A and G
• A crossover occurring in the region between gene G and T
• A crossover occurring in the region between gene T and B
• A crossover occurring in the region between gene A and T

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

A wide range of phenotypic variations occur in the trait for human height.  Which of the following accounts for these variations?

• Polygenic Inheritance
• Codominance
• Incomplete dominance
• Multiple Alleles

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NGSS.HS-LS3-3

Map relative position of the four genes on a chromosome from the data on crossover frequencies.

• ABCD
• ADCB
• CABD
• CBAD

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NGSS.HS-LS4-3

The pedigree shown indicates the expression pattern of VHL in a specific family. Genetic counselors told the affected female that she and her non-carrier husband had a 50% chance of producing children with VHL.  Based on this information, which of the following best describes the inheritance pattern for this disorder?

• X-linked recessive
• Incomplete dominance
• Autosomal dominance
• Autosomal recessive

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Australian Shepherds are a breed of dogs whose coat color is directly impacted by two different genes. The gene that determines basic coat color exhibits a dominant allele (B) for black coat color and a recessive allele (b) for red coat color. Additionally, these dogs can have a solid coat color (mm) or a mixed pattern coat color called merle (Mm). The homozygous dominant coat color is called a lethal white (MM) which produces pups that are deaf and blind. What is the probability that two red Australian shepherds will produce a black pup?

• 0
• 1/4
• 1/2
• 3/4

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

The Australian Shepherds of America Club discourages from mating two merles. Which of the following best explains why merle to merle matings are undesirable?

• The cross has the probability of producing litters with 50% solid coat color pups.
• The cross produces all homozygous recessive pups
• The cross has the probability of producing litters with 25% merle coat pups.
• The cross has a 25% chance of producing homozygous dominant pups.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

What is the genotype of individual III-1?

• X^fX^f
• FF
• Ff
• ff

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NGSS.HS-LS3-1

How many alleles (letters) does a child get from each parent for each trait?

• 1
• 2
• 3
• 4

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NGSS.HS-LS3-1

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

What you see, or the physical appearance.

• Genotype
• Phenotype
• Homozygous
• Heterozygous

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NGSS.HS-LS3-1