Punnett Squares and Heredity

If the dominant trait is having freckles (F) and the recessive trait is no freckles (f), which allele combination(s) below would represent a person who has freckles? (select all that apply)

• FF

• Ff

• ff

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Which of the following allele pairs is homozygous?

• Ee

• BB

• Tt

What is heredity?

• traits passing from offspring to parents
• plants that are cross-pollinated
• traits passing from parents to offspring
• the ratio of dominant to recessive traits

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

Look at the punnett square. What is the probability that the offspring's alleles will be homozygous dominant?

• 100%

• 75%

• 50%

• 25%

• 0%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

When writing allele pairs, the dominant allele is written as a 

• capital letter
• lower case letter
• a number

An organism’s genetic makeup

• genotype

• phenotype

• homozygous

• heterozygous

Look at the punnett square. What is the probability of the offspring showing the recessive trait?

• 100%

• 75%

• 50%

• 25%

• 0%

Tags

NGSS.HS-LS4-3

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 purple?

• 25%
• 0%
• 100%
• 50%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

NGSS.HS-LS3-3

Homozygous is when...

• the alleles are the same
• the alleles are different
• the alleles are absent
• the alleles are present

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

T - tall and t = short
In the punnett square below, what belongs in the missing square

• tt
• Tt
• Bb
• TT

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2