Punnett Square & Genetics

Heterozygous is when...

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

In a heterozygous genotype, the ___________ allele takes over in the phenotype.

• recessive
• dominant
• lower case letter
• both 

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-LS3-3

G = green, g = yellow
The genotype for a yellow plant is...

• GG
• Gg
• gg
• all of the choices result in yellow

Tags

NGSS.HS-LS3-1

B = brown fur  b = white fur
In the punnett square, what is the probability for white fur? 

• 0%
• 25%
• 50%
• 75%

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Red fruit (R) is dominant to yellow fruit (r) in a species of apples. What alleles should go in box 1?

• RR

• Rr

• rr

Tags

NGSS.HS-LS3-1

AA and Aa always show up as

• dominant
• recessive

Tags

NGSS.HS-LS3-1

How many alleles for the same gene do offspring get?

• 1

• 2

• 23

• 100's to 1000's

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-2

In the punnett square shown, what must the genotype of the missing parent be?

• BB
• Bb
• bb
• Tt

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3

Which of the following is a phenotype?

• Aa
• red hair
• heterozygous
• DNA

Tags

NGSS.HS-LS3-3