Genetics Unit Review

Red flowers (R) are dominant over white flowers (r). Select the genotypes that would produce red flowers.

• RR

• Rr

• rr

• Rw

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Select all of the following genotypes that are considered Homozygous.

• AA

• bb

• Hh

• Dd

• zz

Tags

NGSS.HS-LS3-1

Which is a true statement about this picture?

• Brown is recessive

• Brown is dominant

• Blue is dominant

• Blue is codominant

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What percentage of the offspring will be purebred dominant?

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

In the Punnett Square below, what belongs in the missing square?

• tt

• Tt

• Bb

• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What percentage of the offspring will be heterozygous dominant?

• 100%
• 75%
• 50%
• 25%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

What does heterozygous mean?

• An organism that has 2 of the same alleles for a trait.

• An organism that has 2 different alleles for a trait.

• When neither gene is fully dominant; offspring is a mixture of both.

• The different forms of a trait.

Two brown eyed parents (Bb) have a baby. What is the chance their baby is blue eyed?

• 0 %

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Which of the following alleles is homozygous (purebred) recessive?

• Tt
• tt
• TT
• t

How many offspring will show the recessive trait?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2