Genetics Unit Test

The following items are examples of __________.

Items: eye color, hair color, height

• homozygous alleles

• genotype

• heterozygous alleles

• phenotype

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

Tags

NGSS.HS-LS3-1

having two different genes for a trait (sometimes called hybrid).

• protein
• homozygous
• heterozygous
• genotype

A version or variation of a gene

• trait

• gene

• allele

• DNA

Tags

NGSS.HS-LS3-2

Which of the following alleles is homozygous recessive?

• Tt
• tt
• TT
• T

What are the possible phenotype(s) of the offspring? (A-Brown hair; a-blond hair)

• 50 % Brown Hair and 50% Blond Hair

• 25 % Brown Hair and 75% Blond Hair

• 75 % Brown Hair and 25% Blond Hair

• 0% Brown Hair and 100% Blond Hair

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Cross 2 heterozygous tall pea plants. Tall (T) is dominant to short (t). What fraction of the offspring do you predict will be tall?

• 1/4

• 2/4

• 3/4

• 4/4

Tags

NGSS.HS-LS3-1

The blending of two traits is known as ---

• incomplete dominance

• codominance

What type of inheritance pattern is shown here?

• Codominance

• Incomplete dominance

What does this Punnett square and the probabilities of the ofspring represent?

• incomplete dominance

• codominance

Tags

NGSS.HS-LS3-1