Genetics Test Review

A HETEROZYGOUS individual would have the genotype:

• Hh

• hh

• HH

• Hi

In humans, blue eyes are a recessive trait. What genotype would a blue eyed child have?

• BB

• Bb

• bb

• None of the above, brown eyes are dominant.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In pea plants, tall (T) plant alleles are dominant to short (t) plant alleles. If two tall plants (each with the genotype Tt) are crossed, what is the probability that the cross would result in a short pea plant?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Brown eyes (B) are dominant to blue eyes (b). Determine the phenotype for a child with the genotype - Bb

Tags

NGSS.HS-LS3-1

If tall eyeballs (T) are dominant to short eyeballs (t), give the genotypes that are possible for tall eyeballs.

Sections of DNA on a chromosome are called:

• nuclei.

• RNA.

• genes.

• traits.

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What type of inheritance do two alleles have if their traits blend together? 

• Incomplete Dominance
• Co-Dominance
• Mendelian Inheritance
• Homozygous Inheritance

A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?

• Incomplete Dominance
• Co dominance
• Independent assortment
• Recessive inheritance

A plant shows incomplete dominance in size. A tall plant (TT) is crossed with a medium plant (TS). What fraction of plants will also be tall?

• 100 %
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-3

The blending of two traits is known as ---

• incomplete dominance

• codominance