Genetics Check

Which of the following is heterozygous?

• MM

• Mm

• mm

Which of the following is homozygous dominant?

• RR

• Rr

• rr

Which of the following is homozygous recessive?

• QQ

• Qq

• qq

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

Which is a true statements about this picture?

• Brown is recessive
• Brown is dominant
• Blue is dominant
• Blue is codominant

Tags

NGSS.MS-LS3-2

If brown hair is represented by the allele "B" and blond hair is represented by the allele "b" then what must be the genotype of someone who has blond hair?

• BB

• bb

• Bb

• either BB or Bb

If black fur is dominant and white fur is recessive, what are the possible offspring of two black mice bred together?

• All offspring produced from this cross would be black

• All offspring produced from this cross would be white

• Some may be black, some may be white. Depends on genotype of parents.

Tags

NGSS.MS-LS3-2

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

• 0 %
• 25%
• 50%
• 75%

A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?

• 100% BB
• 75% BB and 25%Bb
• 50 % BB and 50% Bb
• 50% Bb and 50% bb

Punnett Square #1

In plants tall is dominant to short.

Cross two heterozygous plants.

What is the genotypic ratio?

• 1:2:1

• 2:2

• 3:1