Genetics quiz

the expression of a trait that occurs when the dominant form of the allele is absent

• Recessive

• Dominant

• Phenotype

• Genotype

What did Gregor Mendel study with the pea plants?

• cross pollination

• inheritance of traits

• flowering

• Number of peas

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NGSS.HS-LS3-2

Traits that are passed down and are found in your DNA are called _____________ traits.

• inherited

• acquired

• homozygous

• heterozygous

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

Having one dominat and one recessive allele would be which type of genotype?

• Homozygous

• Heterozygous (hybrid)

• Phenotype

• Allele

Which of the following is homozygous recessive genotype?

• RR

• Rr

• rR

• rr

How many offspring will show the recessive phenotype?

• 0%

• 25%

• 50%

• 75%

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NGSS.HS-LS3-1

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Where two alternatives for a trait are tall and short, and short is dominant, the genotype of a heterozygous individual would be expressed as which of the following:

• Tt

• TT

• tt

• short

In goats, having horns is dominant and no horns is recessive. If a goat that is heterozygous for horns crosses with one that does not have horns, what are the genotypes of the parents?

• all HH

• all hh

• HH, hh

• Hh, hh

• None of these are correct

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?

• 25%
• 0%
• 100%
• 50%

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NGSS.HS-LS3-1

NGSS.HS-LS3-3

The result of meiosis is:

• two diploid cells
• two haploid cells
• four diploid cells
• four haploid cells