Punnett Squares

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

What belongs in Box 4?

• Y

• YY

• Yy

• yy

Both parents in this Punnet square

• are homozygous dominant

• are homozygous recessive

• are heterozygous

• have blue eyes

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

A red flowered plant (RR) breeds with a White flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?

• 0%

• 25%

• 50%

• 100%

Tags

NGSS.MS-LS3-2

Which of the following allele pairs is heterozygous?

• RR

• Qq

• ss

In plants, tall (T) is dominant to short (t). Perform the following cross: Tt x Tt. What is the probability of producing a short plant?

• 0%

• 25%

• 50%

• 75%

In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?

• rr

• R

• RR

• RR or Rr

A homozygous dominant brown mouse is crossed with a heterozygous brown mouse (tan is the recessive color). 

• 100 % tan

• 100 % brown 

• 50 % brown and 50% tan 

• 75 % brown and 25 % tan 

If a heterozygous parent and a homozygous recessive parent mate, what percentage of their offspring will be dominant?

• 25%

• 50%

• 75%

• 100%

Tags

NGSS.HS-LS3-1

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

• 0 %

• 25%

• 50%

• 75%