Chapter 12 : Introduction to Genetics Test Prep

An offspring will receive how many alleles from each parent to determine a specific trait?

• one
• two
• three
• five

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Which of the following is a phenotype?

• BB
• Bb
• bb
• Blue eyes

Incomplete dominance means that the traits are

• expressed equally
• dominant
• recessive
• blended

One form of a gene is called_______________

• a DNA
• a Phenotype
• a trait
• an allele

If green is dominant over purple, then what is the genotype for this individual?

• Purple
• Green
• GG
• gg

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In pea plants, the tall allele is dominant to the short allele. What key would demonstrate this?

• Tall = T
  Short = S
• Tall = T
  Short = t
• Tall = t
  Short = T
• Tall = TT
  Short = tt

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Which of the following genotypes is homozygous dominant?

• Yy

• yY

• yy

• YY

What is the genotypic ratio of the offspring?

• 3:1

• 1:3

• 1:2:1

• 2:2

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What are the phenotype percentages of the offspring?

(A-Brown fur color; a-white fur color)

• 50 % Brown fur and 50% White fur

• 25 % Brown fur and 75% White fur

• 75 % Brown fur and 25% White fur

• 0% Brown fur and 100% White fur

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If you cross a black guinea pig with a white guinea pig and the offspring are gray, what type of dominant trait would that be.

• incomplete dominance
• codominance
• codependant
• cooperative

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