Genetics Unit Quiz

How many alleles does each parent pass on to their offspring for a single trait?

• one

• two

• four

• six

Which of the following is a phenotype?

• BB
• Bb
• bb
• Blue eyes

Having two of the same alleles for the trait.

• homozygous
• hetrozygous
• protein
• chromosome

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

Which is the correct phenotype for this organism?

• BB
• blue
• green
• bb

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

• Tall = T
  Short = S
• Tall = T
  Short = t
• Tall = t
  Short = T

A heterozygous long-tusked elephant is crossed with a homozygous recessive short-tusked elephant. What is the probability of the offspring having short tusks?

• 0%
• 25%
• 50%
• 75%

Which of the following genotypes is homozygous dominant?

• Yy

• yY

• yy

• YY